1、 METRIC MIL-PRF-49291/11B 10 July 2013 SUPERSEDING MIL-PRF-49291/11A 22 July 2011 PERFORMANCE SPECIFICATION SHEET FIBER, OPTICAL, TYPE II, CLASS 5, SIZE II, COMPOSITION A, WAVELENGTH D, RADIATION RESISTANT, ENHANCED PERFORMANCE CHARACTERISTICS (METRIC) This specification is approved for use by all d
2、epartments and Agencies of the Department of Defense. The requirements for acquiring the product described herein shall consist of this specification sheet and MIL-PRF-49291. 1/ Core diameter is not a specified attribute. Refer to the mode field diameter specifications. 2/ Overall dimension includes
3、 a non-strippable coating (or surface treatment). Cladding along with this coating shall conform to C diameter. Use C dimension in lieu of cladding to determine cladding ovality, core-to- cladding offset and cladding dimensions. 3/ Cladding diameter remains unspecified with condition that optical fi
4、ber must meet specified requirements. 4/ Integrated fiber and cable manufacturing process may exceed this diameter. When this condition occurs, then this configuration shall conform to cabling specification in addition to this specification sheet. FIGURE 1. Dimensions and configuration of optical fi
5、ber construction. AMSC N/A FSC 6010 PIN Dimensions A (m) B (m) C (m) M49291/11-01 M49291/11-01A 1/ 3/ 125 0.7 2/ M49291/11-02 M49291/11-02A 1/ 125 0.7 245 10 4/ Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-49291/11B 2 Circle (solid) Diamet
6、er (m) Inner 124.3 Second 125.7 FIGURE 2. Tolerance fields. Part or identifying number (PIN). (See figure 1 and table II): M49291/11-01 M49291/11-01A M49291/11-02 M49291/11-02A REQUIREMENTS: Dimensions and configuration: Diameter: See figure 1 and figure 2. Ovality: Core: Not applicable. Cladding: 1
7、 percent. Offset: Core-to-cladding: 0.7 m. Fiber-to-coating: Coating-cladding concentricity error: 12.0 m. Overall coating concentricity ratio (OCCR or coating noncircularity): 0.70 for 250 m diameter coatings. Fiber curl: 4.0 m when measured in accordance with TIA-455-111. Cladding boundary Reticle
8、 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-49291/11B 3 Optical parameters: Mode field diameter: The mode filed diameter shall be within the range from 8.2 to 9.5 at 1,310 nm and from 9.4 to 10.5 at 1,550 nm. Splices within the optical f
9、iber: Splices within the optical fiber are not allowed. Proof test: 1.38 GPa (200 kpsi). Fiber mass/unit length: 0.1 kg/km maximum. Change in optical transmittance: Measurements to be made at 1,550 nm 20 nm. Maximum attenuation rate: Spectral attenuation shall be performed at a sufficient number of
10、wavelengths to cover the applicable optical transmission windows and sources for attenuation. Sufficient coverage includes the optical transmission windows (850, 1,300, 1,310 and 1,550 nm), ultraviolet absorption band (600 to 870 nm), Rayleigh scattering losses (800 to 1,200 nm), OH impurity absorpt
11、ion peaks (945, 1,249 and 1,383 nm) and infrared absorption (1,600 to 1,700 nm). Use of a source and power meter to perform this measurement is not acceptable. Maximum attenuation rate over the wavelength range from 1,250 nm to 1,650 nm shall be less than 0.5 dB/km Attenuation rate for wavelengths o
12、f operation shall not exceed 0.35 dB/km at 1,310 nm 20 nm, 0.22 dB/km at 1,550 nm 20 nm and 0.25 dB/km at 1,625 nm 20 nm. Attenuation uniformity: Applicable except perform at 1,310 nm and 1,550 nm. There shall be no discontinuities in attenuation along the length greater than 0.1 dB. Numerical apert
13、ure: Not applicable. Bandwidth: Not applicable. Chromatic dispersion: Applicable except chromatic dispersion shall be 3.0 ps/nm-km at 1,310 nm 20 nm and 20 ps/nm-km at 1,550 nm 20 nm. Zero dispersion wavelength shall be 1312 nm 12 nm. The value of the slope at the zero dispersion wavelength shall be
14、 not greater than 0.092 ps/nm2-km. Cutoff wavelength: Applicable except the cutoff wavelength shall be 1,260 nm. Transient attenuation: Not applicable. Macrobend attenuation: Applicable except the test shall be performed in accordance with TIA-455-62, method B, with the macrobend attenuation obtaine
15、d for each row in table I. The macrobend attenuation shall not exceed the maximum values listed in table I. Polarization mode dispersion: The polarization mode dispersion shall be kmps /2.0 when measured in accordance with either TIA-455-122 or TIA-455-124. Provided by IHSNot for ResaleNo reproducti
16、on or networking permitted without license from IHS-,-,-MIL-PRF-49291/11B 4 TABLE I. Macrobend attenuation test parameters. Mandrel diameter mm (inch) Number of turns around mandrel Measurement wavelength (nm) Macrobend attenuation (dB) 76 1 (3.0 .04) 100 1,310 20 0.1 76 1 (3.0 .04) 100 1,550 25 1.0
17、 30 1 (1.2 .04) 10 1,310 20 0.03 30 1 (1.2 .04) 10 1,550 25 0.03 30 1 (1.2 .04) 10 1,625 25 0.1 20 1 (.79 .04) 1 1,310 20 0.1 20 1 (.79 .04) 1 1,550 25 0.05 20 1 (.79 .04) 1 1,625 25 0.1 15 .5 (.59 .02) 1 1,310 20 0.1 15 .5 (.59 .02) 1 1,550 25 0.1 15 .5 (.59 .02) 1 1,625 25 0.4 ENVIRONMENTAL: Tempe
18、rature range: See table II. Fluid immersion aging: Not applicable. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-49291/11B 5 TABLE II. Temperature range. 1/ PIN Operating oC (F) Nonoperating oC (F) Storage oC (F) M49291/11-01 M49291/11-02 2
19、/ -55 to +165 (-67 to 329) -40 to + 85 (-40 to 185) -40 to +85 (-40 to 185) M49291/11-01A M49291/11-02A 3/ -46 to +85 (-51 to 185) -55 to +85 (-51 to 185) -55 to +85 (-51 to 185) 1/ Temperatures are specified in degrees Centigrade, Fahrenheit equivalents are specified in parentheses. 2/ Temperature
20、ranges in row 2 conform to those specified for other MIL-SPEC fiber optic cabling components for aircraft applications. 3/ Temperature ranges in row 3 conform to those specified for other MIL-SPEC fiber optic cabling components for standard applications (such as the telecommunication industry). Mech
21、anical strippability: Applicable except, in addition, each individual optical fiber shall comply with the following diameter and residue requirements and test methods: Diameter requirement. Requirement that the stripped optical fiber complies with diameter B in figure 1 shall be verified by successf
22、ul insertion and removal of each optical fiber stripped end into a ring gauge/die/ferrule with a hole diameter of 125 +1/-0 micron. It is in the interest of the implementer to choose a gauge closer to 126 micron than 125 microns. Residual requirement. Requirement that no residual coating material re
23、mains on fiber shall be verified by the performance of a fiber pullout test. The end of each stripped length of optical fiber shall be terminated onto the end of a MIL-PRF-29504 terminus (or other suitable fiber optic connector if approved by the qualifying activity prior to test sample fabrication)
24、. Fabrication shall be performed as specified in NAVSEA Drawing 8283255. A copy of this document can be obtained at web site: https:/fiberoptics.nswc.navy.mil/ in the NAVSEA Drawing section under component Information. The fiber pull out force shall be tested by applying a 14.0 N (3.1 pounds) axial
25、tensile load between the optical fiber and the terminus for a minimum duration of one minute. At the completion of the test, the optical fiber shall be visually examined and length measured to verify that no fiber pull out occurred. Splicing compatibility: Six 10 meter (32.8 feet) lengths of optical
26、 fiber conforming to the requirements of this specification sheet shall be spliced, (using either a fusion splicer or mechanically splice) and connectorized (using MIL-PRF-29504/4 and MIL-PRF-29504/5 termini) to optical fiber conforming to MIL-PRF-49291/7. Three sample lengths are to be used for eac
27、h splice or connector. An insertion loss measurement shall be performed in accordance with Method B of TIA/EIA-455-34. The insertion loss shall not exceed 0.2 dB per splice and 0.5 dB per connector mated pair when performed at a wavelength of 1,310 nm. Dynamic tensile strength: Applicable. Fungus: A
28、pplicable. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-49291/11B 6 Thermal shock: Applicable as specified for M49291/11-01A and M49291/11-02A. Applicable for M49291/11-01 and M49291/11-02, except that the temperatures of -55C +0C/-5C (-67
29、F +0F/-8F) and 165C +5C/-0C (329F +8F/-0F) shall be used for the low and high soak temperatures, respectively. Test shall be performed in accordance with TIA-455-71, schedule C-0 (5 cycles). The change in optical transmittance shall be measured during (towards the end of each soak temperature) and a
30、fter the test. Storage temperature: Applicable. Temperature cycling: Applicable as specified for M49291/11-01A and M49291/11-02A. Applicable for M49291/11-01 and M49291/11-02 except for the optical fiber with a -55C to 165C (-67F to 329F) temperature range, perform the following in lieu of the speci
31、fied temperature cycling test. Optical fiber shall be tested in accordance with TIA-455-3 using the setup and procedure specified in measurement 3301 of MIL-STD-1678-3 with the temperature profile in table 3301-II. The change in optical transmittance shall be measured during and after the test. At a
32、 minimum for the “during test” measurements, an optical transmittance measurement shall be performed towards the end of each soak period (maintain step) after every 50 cycles. A post test visual examination of the test specimens shall reveal no surface impairment or any damage detrimental to the ope
33、ration of the test specimens. Test fixtures, if used, must be of minimum mass and approved by the qualifying activity. No other mass (item that causes significant thermal lag) shall be added inside the chamber. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from
34、 IHS-,-,-MIL-PRF-49291/11B 7 Life aging (temperature life): Applicable as specified for M49291/11-01A and M49291/11-02A. Applicable for M49291/11-01 and M49291/11-02 except for the optical fiber with a -55nullC to 165nullC (-67nullF to 329nullF) temperature range, perform the following in lieu of th
35、e specified temperature cycling test. Optical fiber shall be tested in accordance with TIA-455-3 using the setup and procedure specified in Measurement 3301 of MIL-STD-1678-3 with the temperature profile in table 3301-II. The change in optical transmittance shall be measured during and after the tes
36、t. At a minimum for the “during test” measurements, an optical transmittance measurement shall be performed towards the end of each soak period (maintain step) after every 50 cycles. A post test visual examination of the test specimens shall reveal no surface impairment or any damage to the operatio
37、n of the test specimens. Test fixtures, if used must be of minimum mass and approved by the qualifying activity. NO other mass (item that causes significant thermal lag) shall be added inside the chamber. Nuclear radiation resistance: Nuclear radiation resistance requirements and test conditions sha
38、ll be as shown below and in table III and table IV: Light launch conditions: In accordance with TIA-455-78. Wavelength: 1,310 nm 25 nm. Source type: Laser diode with FWHM spectral width 10 nm. TABLE III. Steady state gamma radiation test conditions. Test temperature (oC) Dose rate (rad (Si)/sec) Tot
39、al dose (rad (Si) -28 2 +25 2 +85 2 50 +0, -20 Classified (Some nuclear radiation resistance characteristics of this optical fiber are classified and shall be obtained from the qualifying activity. Application to receive these requirements must be made through the Department of the Navy, Naval Surfa
40、ce Warfare Center, Dahlgren Division, ATTN: Code B35, 17320 Dahlgren Road, Dahlgren, VA 22448-5100. Information concerning security clearance classification and “need to know“ must be detailed in the request.) TABLE IV. Radiation test requirements. Maximum induced attenuation (dB/km) Attenuation at
41、specified recovery time (dB/km) Specified recovery time (sec) 50 1/ 15 at -28oC (-18oF) 5 at 25oC (77oF) 5 at 85oC (185oF) 1/ 1,000 1/ The radiation induced loss for a given threat. The total dose associate with the threat is classified and not necessarily equal to the test total dose. Provided by I
42、HSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-49291/11B 8 CONFORMANCE: Test samples for qualification: Reels of optical fiber produced for initial qualification and quality conformance shall be from at least two different preforms (see 4.5.1). Qualifica
43、tion: Qualification shall consist of performing testing specified in table V. TABLE V. Qualification inspections. Test performed Initial qualification Initial uncoiling preparation Group 1 (3 spools-2km each) 1/ Visual and mechanical X OTDR tests: Fiber length X Attenuation uniformity X Parameter te
44、sts: Attenuation rate X Numerical aperture (MM only) Core diameter (MM only) Cutoff wavelength(SM only) X Mode field diameter (SM only) X Transient attenuation (MM only) Macrobend attenuation X Bandwidth-overfill (MM only) Bandwidth-RML/EMBc (MM only) Chromatic Dispersion X Polarization mode dispers
45、ion (SM only) X Fiber curl (SM only) X Mass/unit length X Geometry tests: End view: Core ovality (MM only) Cladding diameter X Cladding ovality X Core to cladding offset X Side view: Coating diameter X Coating-cladding concentricity error X Overall coating concentricity ratio X Group 2(samples off 3
46、 spools) 1/ Tensile proof X See footnotes at end of table Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-49291/11B 9 TABLE V. Qualification inspections - Continued. Test performed Initial qualification Mechanical strippability X Dynamic tens
47、ile strength X Splice compatibility X Group 3 (same 3 spools-2km ea 1/, 2/, 5/, 6/) Thermal shock 3/ X Storage temperature 4/ X Temperature humidity cycling 4/ X Mechanical strippability (post TH cycling) X Temperature cycling 4/ X Life aging (temperature life) 4/ =daily 7/ X Mechanical strippabilit
48、y (post Temp life) X Group 4(samples off 3 spools) Nuclear radiation resistance 4/ X Fungus resistance X NOTES: 1/ See table I in basic specification (MIL-PRF-49291) for specimen lengths. 2/ OOT = Change in optical transmittance. Perform in accordance with TIA-455-20 for transmitted power adhering strictly to the setup and test procedure specified in Measurement 2102 of MIL-STD-1678-2. 3/ Perform OOT after the test only. 4/ Perform OOT both during and after the test. 5/ Sample lengths: Recommend to prepare before group 1. Fo
