The present disclosure relates to the field of optical fiber cable. More
particularly, the present disclosure relates to an aerial drop optical fiber cable with optimizedbreaking load components.
BACKGROUND
[0002] Over the last few years, there has been an exponential growth in
waveguide to the subscriber applications due to an increase in demand for high speeds and bandwidth. The waveguide to the subscriber applications require a broadband optical waveguide distribution network. The optical waveguide distribution network includes optical waveguide distribution cables. Traditionally, aerial optical fiber cables are desirable for use in the waveguide to the subscriber applications. These aerial optical fiber cables form an external link between a distribution cable and the subscriber. These aerial optical fiber cables are used for aerial installation and clamped on poles. Typically, these aerial optical fiber cables include a number of cylindrical retaining elements inside a core of the optical waveguide cable, water swellable yarns and an outer jacket. In addition, these aerial optical fiber cables include embedded robust components embedded inside the outer jacket. The embedded robust components may be made of brass coated steel wire.
[0003] The presently available aerial optical fiber cables have several
drawbacks. The aerial optical fiber cables exert force on the poles on which the cables are clamped whenever any external load is applied on the cable.

This leads to poles being broken and damaged which increases the maintenance cost. In addition, the prior art aerial optical fiber cables do not allow easy access to waveguides. Further, the prior art aerial optical fiber cables are not round in shape which does not allow the cables to be easily installed in ducts. The aerial optical fiber cables cannot be blown or pulled easily inside the duct to a non-round shape. Furthermore, the material used for the core of the optical fiber cable should be able to facilitate easy installation of the optical fiber cable.
[0004] There are a few patent applications which provide an aerial optical
fiber cable. In an example, CN113406757A discloses an optical fiber cable with break load of 1000-1500N, strength member break load 500-600N. However, the prior art does not mention about break load of cylindrical enclosure and the ratio. Also, the strength members are non-metal. In another example, US7783147B2 discloses an optical fiber cable with break load of about 2000N. However, the prior art does not talk about break load of strength members and the cylindrical enclosures.
[0005] In light of the above stated discussion, there is a need for an aerial
drop optical fibercable which overcomes the disadvantages of the prior art aerial drop cables.

OBJECT OF THE DISCLOSURE
[0006] A primaryobject of the disclosure is to provide an optical waveguide
cable with optimized breaking load components.
[0007] Another object of the present disclosure is to provide the optical
waveguide cable with robust components of brass coated steel wire.
[0008] Yet another object of the present disclosure is to provide the optical
waveguide cable with low break load cylindrical retaining elements.
SUMMARY
[0009] In an aspect, the present disclosure provides an optical fiber cable.
The optical fiber cable includes a plurality of optical waveguides. In addition, the optical fiber cable includes one or more cylindrical retaining elements housing the plurality of optical waveguides. Further, the optical fiber cable includes a sheath. The sheath encloses the one or more cylindrical retaining elements. The one or more cylindrical retaining elements have a filling coefficient between 0.5 to 0.8. The filling coefficient is a ratio of cross-sectional area of the plurality of optical waveguides inside a cylindrical retaining element of the one or more cylindrical retaining elements and inner cross-sectional area of the retaining element of the one or more cylindrical retaining elements. The sheath has one or more embedded strength members. The ratio of breaking load of the one or more cylindrical retaining element to the embedded strength member is less than or equal to 1.

STATEMENT OF THE DISCLOSURE
The present disclosure provides an optical fiber cable. The optical fiber cable includes a plurality of optical waveguides. In addition, the optical fiber cable includes one or more cylindrical retaining elements housing the plurality of optical waveguides. Further, the optical fiber cable includes a sheath. The sheath encloses the one or more cylindrical retaining elements. The one or more cylindrical retaining elements have a filling coefficient between 0.5 to 0.8. The filling coefficient is a ratio of cross-sectional area of the plurality of optical waveguides inside a cylindrical retaining element of the one or more cylindrical retaining elements and inner cross-sectional area of the retaining element of the one or more cylindrical retaining elements. The sheath has one or more embedded strength members. The ratio of breaking load of the one or more cylindrical retaining element to the embedded strength member is less than or equal to 1.

BRIEF DESCRIPTION OF THE FIGURES
[0011] Having thus described the invention in general terms, reference will
now be made to the accompanying drawings, which are not necessarily drawn to scale, and wherein:
[0012] FIG. 1 illustrates a cross sectional view of an optical fiber cable with
onecylindrical retaining element, in accordance with an aspect of the present disclosure;
[0013] FIG. 2 illustrates a cross sectional view of the optical fiber cable with
two cylindrical retaining elements, in accordance with another aspect of the present disclosure; and
[0014] FIG. 3 illustrates a cross sectional view of the optical fiber cable
witha plurality of cylindrical retaining elements, in accordance with yet another aspect of the present disclosure.
[0015] It should be noted that the accompanying figures are intended to
present illustrations of exemplary depictions of the present disclosure. These figures are not intended to limit the scope of the present disclosure. It should also be noted that accompanying figures are not necessarily drawn to scale.

DETAILED DESCRIPTION
[0016] Reference in this specification to "one aspect" or "an aspect" means
that a particular feature, structure, or characteristic described in connection with the aspect is included in at least one aspect of the present technology. The appearance of the phrase "in one aspect" in various places in the specification are not necessarily all referring to the same aspect, nor are separate or alternative aspects mutually exclusive of other aspects. Moreover, various features are described which may be exhibited by some aspects and not by others. Similarly, various requirements are described which may be requirements for some aspects but no other aspects.
[0017] Reference will now be made in detail to selected aspects of the
present disclosure in conjunction with accompanying figures. The aspects described herein are not intended to limit the scope of the disclosure, and the present disclosure should not be construed as limited to the aspects described. This disclosure may be embodied in different forms without departing from the scope and spirit of the disclosure. It should be understood that the accompanying figures are intended and provided to illustrate aspects of the disclosure described below and are not necessarily drawn to scale. In the drawings, like numbers refer to like elements throughout, and thicknesses and dimensions of some components may be exaggerated for providing better clarity and ease of understanding.
[0018] Moreover, although the following description contains many specifics
for the purposes of illustration, anyone skilled in the art will appreciate that many variations and/or alterations to said details are within the scope of the present technology. Similarly, although many of the features of the present

technology are described in terms of each other, or in conjunction with each other, one skilled in the art will appreciate that many of these features can be provided independently of other features. Accordingly, this description of the present technology is set forth without any loss of generality to, and without imposing limitations upon, the present technology.
[0019] It should be noted that the terms "first", "second", and the like, herein
do not denote any order, ranking, quantity, or importance, but rather are used to distinguish one element from another. Further, the terms "a" and "an" herein do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced item.
[0020] FIG. 1 illustrates a cross sectional view of an optical fiber cable 100, in accordance with an aspect of the present disclosure. In general, the optical fiber cable 100 is a network cable that contains strands or array of glass waveguides inside aprotective casing. The glass waveguides are used to carry optical signals. The insulated casing facilitates to protect the waveguides from heat, cold, unwanted disturbances and external interference from other types of wiring. The insulated casing provides protection to the optical fiber cable 100 from ultraviolet rays of sun. The optical fiber cable 100 is designed for long distance transmission of optical signal. The optical fiber cable 100 enables very high speed data transmission. The optical fiber cable 100 transmits data at a higher speed than copper data cable. The optical fiber cable lOOtransmits data at much higher band width than copper data cable.
[0021] The optical fiber cable 100 is a light weight optical fiber cable 100. In general, the light weight optical cables are employed for aerial installations. The optical fiber cable 100 is a self-supporting cable. The

optical fiber cable 100 is specially designed for easy and economical aerial installation. The optical fiber cable 100 is used for a wide variety of applications. The wide variety of applications includes high speed internet, data transmission, optical sensor, intercommunication, optical circuit installations and the like. The optical fiber cable 100 is very less susceptible to interference.
[0022] The optical fiber cable 100 is associated with a longitudinal axis (not shown in figure). The longitudinal axis of the optical fiber cable 100 passes through a geometrical center of the cross section of the optical fiber cable 100. The optical fiber cable 100 is a single mode optical waveguide cable. In an aspect of the present disclosure, the optical fiber cable 100 is a multimode optical fiber cable. In general, the optical fiber cable 100 is used for installation in ducts and micro ducts. In addition, the optical fiber cable 100 is used for indoor and outdoor applications.
[0023] The optical fiber cablelOO includes a plurality of optical
waveguidesl02,one or more cylindrical retaining elements 104, a sheathl06, one or more embedded strength membersl08 and a water blocking element 110.The above combination of structural elements enables an improvement in a plurality of parameters of the optical fiber cable 100. The plurality of parameters includes attaining requiredbreaking load, crush resistance, impact strength, torsion, transmission characteristics and the like.
[0024] The optical fiber cablelOO includes theplurality of optical
waveguidesl02. The plurality of optical waveguidesl02is substantially present along the longitudinal axis of the optical fiber cablelOO.Each of the plurality of optical waveguides 102 is a light transmission element. The light

transmission element is also referred to as optical waveguide. In general, each of the plurality of optical waveguides 102is a light transmission element used for transmitting information as light pulses from one end to another. In addition, each of the plurality of optical waveguidesl02is a thin strand of glass capable of transmitting optical signals. Also, each of the plurality of optical waveguides 102 is configured to transmit large amounts of information over long distances with relatively low attenuation. Each of the plurality of optical waveguides 102 is configured to transmit large amount of information or data over long distance with high speed. In an aspect, the plurality of optical waveguides 102 is at least one of loose optical fibers, IBRs, flat ribbons optical fiber, rollable ribbonsoptical fiber and the like.
[0025] Further, each of the plurality of optical waveguides 102 includes a
core region and a cladding region. The core region is an inner part of an optical waveguide and the cladding section is an outer part of the optical waveguide. Moreover, the core region is defined by a central longitudinal axis of each of the plurality of optical waveguides 102. In addition, the cladding region surrounds the core region. Each of the plurality of optical waveguides 102 is made of silicon glass. In an embodiment of the present disclosure, each of the plurality of optical waveguides 102 is made of any other suitable material of the like. Each of the plurality of optical waveguides 102 is a single mode optical waveguide. In an aspect of the present disclosure, each of the plurality of optical waveguides 102 is a multimode optical waveguide. The wavelength of light traveling through each of the plurality of optical waveguides 102 lies in a range of about 1285 nanometer to 1625 nanometer with cutoff wave length of 1260 nanometers. In an aspect of the present disclosure, the wavelength of light traveling through each of the plurality of optical waveguides 102 lies in any other suitable range.

[0026] The optical fiber cablelOO includes the one or more cylindrical
retaining elements 104. The one or more cylindrical retaining elements 104are positionedsubstantially along the longitudinal axis of the optical fiber cablelOO. The one or more cylindrical retaining elements 104 extend along the entire length of the optical fiber cable 100. The one or more cylindrical retaining elements 104 are positioned in core of the optical fiber cablelOO. In an aspect of the present disclosure, the one or more cylindrical retaining elements 104 concentrically surround the plurality of the optical waveguides 102 of the optical fiber cable 100. The one or more cylindrical retaining elements 104 is designed to provide a sound covering to light transmissions elements of the optical fiber cable 100.The plurality of optical waveguides 102 are randomly arranged inside the one or more cylindrical retaining elements 104.
[0027] In general, the one or more cylindrical retaining elements 104 meet
an optimal requirement of dimensions to facilitate free arrangement of the plurality of optical waveguides 102. The one or more cylindrical retaining elements 104 provide primary protection to the optical elements. The one or more cylindrical elements 104are micromodules. Micromodules are tubes with low break load of composition material.In general, in order to facilitate easy installation, cylindrical enclosures with reduced strength are desired as they do not need any sophisticated tools for tearing.The one or more cylindrical retaining elementsl04has a breaking load of 3-10N. Further, the micromodules are filled with water blocking gel. In an aspect, the one or more cylindrical retaining elements 104 is filled with water blocking gel. The water blocking gel prevents water from passing through the one or more cylindrical retaining elements 104.In an implementation, the one or more cylindrical retaining elements 104 may be formed without the water blocking gel.

[0028] Each of the one or more cylindrical retaining elements 104 has a
breaking load in a range of 3N to lON.In addition, each of the one or more cylindrical retaining elements 104 has a filling coefficient is in a range of 0.5 to 0.8. The filling coefficient is a ratio of cross-sectional area of the plurality of optical waveguides 102 inside a cylindrical retaining element of the one or more cylindrical retaining elements 104 and inner cross-sectional area of the retaining element of the one or more cylindrical retaining elements 104. In an aspect, the filling coefficient of the one or more cylindrical retaining elements 104 is in a range of 0.57 to 0.8 when the plurality of optical waveguides 102 has a diameter in a range of 200um+-20um. In another aspect, the filling coefficient of the one or more cylindrical retaining elements 104 is in a range of 0.6 to 0.7 when the plurality of optical waveguides 102 has a diameter in a range of 180um+-20um. In yet another aspect, the filling coefficient of the one or more cylindrical retaining elements 104 is in a range of 0.55 to 0.65 when the plurality of optical waveguides 102 has a diameter in a range of 160um+-20um. In yet another aspect, the filling coefficient of the one or more cylindrical retaining elements 104 is in a range of 0.5 to 0.65 when the plurality of optical waveguides 102 has a diameter in a range of 140um+-20um.
[0029] The optical fiber cablelOO includes a sheath 106.The sheath
106surrounds the one or more cylindrical retaining elements 104. The sheath 106is an outer most layer of the optical fiber cable 100. The sheath 106provides protection to the optical fibre cable 100 from environmental conditions. The environmental conditions include but may not be limited to rainfall, snowfall, wind, and sunlight. The optical fibre cable 100 includes one or more embedded strength membersl08. Each of the one or more embedded strength membersl08are embedded in the sheathl06 of the optical fibre cable 100. Number of the one or more embedded strength membersl08in the sheath 106 may vary.

[0030] In general, the purpose of strength members is to provide mechanical
strength to the optical fiber cable 100. Each of the one or more embedded strength members 108 is embedded in the sheathl06. Each component of the one or more embedded strength members 108 is a brass coated steel wire. Each bundle of the one or more embedded strength members 108 includes a plurality of brass coated steel wire twisted together. The brass coated steel wire of the one or more embedded strength members 108 is coated with ethylene acrylic acid. In an aspect of the present disclosure, the brass coated steel wire of each robust component of the one or more embedded strength members 108 is coated with any other suitable material of the like.
[0031] The one or more embedded strength membersl08are characterized by
a breaking load. The breaking load of the one or more embedded strength membersl081ies in a range of about 500 to 600 Newton. In an aspect of the present disclosure, the breaking load of the one or more embedded strength membersl081ies in any other suitable range of the like. In general, the breaking load of cable is the minimum load at which the component will break when the ends of the cable are prevented from rotational and other external forces generated at clamped portion of aerial installation.
[0032] Two bundles of the one or more embedded strength members 108 are
embedded 180° apart from one another. In an aspect of the present disclosure, the one or more embedded strength members 108 are embedded in the sheathl06in pairs of bundles. Each of the pair of bundle is embedded in the sheathl06 diametrically opposite to one another. In an aspect of the present disclosure, one pair of bundles of the one or more embedded strength members 108 is embedded diametrically opposite to one another in the sheathl06. In another embodiment of the present disclosure, a plurality of

pair of bundles of the one or more embedded strength members 108 is embedded diametrically opposite to one another. In an embodiment of the present disclosure, the one or more embedded strength members 108 are embedded in the sheathl06in any other suitable pattern of the like.
[0033] In general,the brass coating facilitates to protect the steel wire from
corrosion. Further, the brass coating of steel wire provides requiredfinal tensile strength and break load with maintained third diameter as per application requirements. In general, a coating of ethylene acrylic acid improves a plurality of desirable properties of the brass coated steel wire. The ethylene acrylic acid coating provides necessary wire-to-rubber adhesion properties to steel wire. Further, the ethylene acrylic coating improves the adhesion of brass plated steel wire to the jacket material. Combining properties of the brass coating and the ethylene acrylic coating, brass plated steel wire exhibitsa plurality of properties. The plurality of properties includes water resistance, flexibility, crystallinity, chemical resistance and the like.
[0034] The optical fiber cable 100 includes water blocking element 110.The
water blockingelement 110 prevents water ingression in the one or more cylindrical retaining elements 104.In an aspect of the present disclosure, the water blocking element 110 may be located in a core of an optical fiber cable 100. Further, the water blocking element 110 may have a weight as 9000Denier. Alternatively, the water blocking element 110 may have other suitable weight. The ratio of breaking load of the one or more cylindrical retaining element 104 to the one or more embedded strength members 108 is less than or equal to 1. Alternately, the ratio of breaking load of the one or more cylindrical retaining element 104 to the one or more embedded strength members 108 is between 0.004 to 0.2.In an aspect of the present disclosure,

the ratio of breaking load of the one or more cylindrical retaining elements 104 to the one or more embedded strength members 1081ies in any other suitable range of the like. In general, the breaking load of cable is the minimum load at which the cable will break when the ends of the cable are prevented from rotational & other external forces generated at clamped portion of aerial installation. In general, in optical air drop cables, break load of core elements such as micromodules is kept low as compared to the strength members to support easy installation. The optical fiber cable 100 is characterized by a nominal diameter. In an aspect, the nominal diameter of the optical fiber cable 100 lies in a range of about 4.0 millimeters to 9.0 millimeters. In anotheraspect of the present disclosure, the nominal diameter of the optical fiber cable 100 lies in any other suitable range of the like. The nominal diameter is the external diameter of the optical fiber cable 100.
[0035] In addition, the optical fiber cable 100 is characterized by a cable
weight. In an aspect, the cable weight of the optical fiber cable lOOis 60kg per kilo meter. In anotheraspect of the present disclosure, the cable weight of the optical fiber cable 100 lies in any other suitable range. The cable weight refers to the nominal weight of the optical fiber cable 100.
[0036] In addition, the optical fiber cable 100 is characterized by resistance
to electrical tracking and erosion. In general, an electrical breakdown on the surface of an insulating material wherein an initial exposure to electrical arcing heat carbonizes the material.In an aspect, the optical fiber cable 100 resists electrical tracking and erosion under a voltage stress of at least 7kV. In anotheraspect of the present disclosure, the optical fiber cable lOOresists electrical tracking and erosion under a voltage stress in any other suitable range.In addition, the optical fiber cable 100 is characterized byammonium chloride contamination flow rate. In an aspect, the ammonium chloride

contamination flow rate of the optical fiber cable 100 is 0.9 ml/min for at least 6 hours.In anotheraspect of the present disclosure, the ammonium chloride contamination flow rate of the of optical fiber cable 100 lies in any other suitable range.
[0037] In an aspect, the optical fiber cable lOOdoes not have a central
strength member.
[0038] The foregoing descriptions of pre-defined aspects of the present
technology have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the present technology to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teaching. The aspects were chosen and described in order to best explain the principles of the present technology and its practical application, to thereby enable others skilled in the art to best utilize the present technology and various aspects with various modifications as are suited to the particular use contemplated. It is understood that various omissions and substitutions of equivalents are contemplated as circumstance may suggest or render expedient, but such are intended to cover the application or implementation without departing from the spirit or scope of the claims of the present technology.

WE CLAIMS:

1. An optical fiber cable (100) comprising:
a plurality of optical waveguides (102);
one or more cylindrical retaining elements (104) housing the plurality of optical waveguides (102),
wherein the one or more cylindrical retaining elements (104) has a filling coefficient between 0.5 to 0.8, whereinthe filling coefficient is a ratio of cross-sectional area of the plurality of optical waveguides (102) inside a cylindrical retaining element of the one or more cylindrical retaining elements (104) and inner cross-sectional area of the retaining element of the one or more cylindrical retaining elements (104); and
a sheath (106) enclosing the one or more cylindrical retaining elements (104), wherein the sheath (106) has one or more embedded strength members (108),
wherein aratio of breaking load of a cylindrical retaining element (104) to an embedded strength member (108) is less than or equal to 1.
2. The optical fiber cable (100) as claimed in claim 1, wherein the filling
coefficient is in a range of 0.57 to 0.8 when the plurality of optical waveguides
(102) has a diameter in a range of 200um+-20um, wherein the filling coefficient is

in a range of 0.6 to 0.7 when the plurality of optical waveguides (102) has a diameter in a range of 180um+-20um, wherein the filling coefficient is in a range of 0.55 to 0.65 when the plurality of optical waveguides (102) has a diameter in a range of 160um+-20um and wherein the filling coefficient is in a range of 0.5 to 0.65 when the plurality of optical waveguides (102) has a diameter in a range of 140um+-20um.
3. The optical fiber cable (100) as claimed in claim 1, wherein the optical fiber cable (100) does not have a central strength member.
4. The optical fiber cable (100) as claimed in claim 1, wherein the optical fiber cable (100) has a weight of less than 60kg/km.
5. The optical fiber cable (100) as claimed in claim 1, wherein the optical fiber cable (100) has a nominal diameter in a range of 4mm to 9mm.
6. The optical fiber cable (100) as claimed in claim 1, wherein the one or more embedded strength members (108) is stranded brass plated steel wires.
7. The optical fiber cable (100) as claimed in claim 1, wherein each of the one or more embedded strength members (108) has a breaking load in a range of 500N to 700N.
8. The optical fiber cable (100) as claimed in claim 1, wherein each of the one or more cylindrical retaining elements (104) has a breaking load in a range of 3Nto ION.

9. The optical fiber cable (100) as claimed in claim 1, wherein the one or more embedded strength members (108) are two.
10. The optical fiber cable (100) as claimed in claim 1, wherein the one or more embedded strength members (108) are positioned 180 degrees apart.
11. The optical fiber cable (100) as claimed in claim 1, wherein the optical fiber cable (100) resists electrical tracking and erosion under a voltage stress of at least 7kV and an ammonium Chloride contamination flow rate of 0.9 ml/min for at least 6 hours.
12. The optical fiber cable (100) as claimed in claim 1, wherein a ratio of breaking load of a cylindrical retaining element (104) to an embedded strength member (108) is between 0.004 to 0.2.