DLA MIL-PRF-49291 12 B-2013 FIBER OPTICAL TYPE I CLASS I SIZE III COMPOSITION A WAVELENGTH B RADIATION RESISTANT ENHANCED PERFORMANCE CHARACTERISTICS AIRCRAFT APPLICATIONS (METRIC).pdf

1、AMSC N/A FSC 6010 MIL-PRF-49291/12B 10 July 2013 SUPERSEDING MIL-PRF-49291/12A 22 July 2011 PERFORMANCE SPECIFICATION SHEET FIBER, OPTICAL, TYPE I, CLASS I, SIZE III, COMPOSITION A, WAVELENGTH B, RADIATION RESISTANT, ENHANCED PERFORMANCE CHARACTERISTICS/AIRCRAFT APPLICATIONS (METRIC) This specificat

2、ion is approved for use by all Departments 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. For legacy use only. For new platforms using multimode fiber, the Joint Fiber Optic Working G

3、roup (JFOWG) has imposed standardization with MIL-PRF-85045/31 fiber optic cable containing MIL-PRF-49291/10 multimode optical fiber. This specification sheet applies to existing platforms (ones in which the contract has been awarded) where the fiber optic portion of the network uses 50/125 micron f

4、iber size. PIN Dimensions A (m) B (m) C (m) M49291/12 -01 M49291/12 -01A 50 2.5 125 1 500 25 1/, 2/ M49291/12 -02 M49291/12-02A 50 2.5 125 1 245 7 2/ FIGURE 1. Dimensions and configuration of optical fiber construction. 1/ Coating shall conform to C diameter except a diameter of 450 25 microns (m) i

5、s permitted but less preferred for purposes of standardization. 2/ 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. METRIC Provided by IHSNot

6、for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-49291/12B 2 Circle (solid) Diameter (m) Inner 47.5 Second 52.5 Third 124.0 Fourth 126.0 FIGURE 2. Tolerance fields. Part or identifying number (PIN). (See figure 1 and table II): M49291/12-01 M49291/12-01A M49291/

7、12-02 M49291/12-02A DIMENSIONS AND CONFIGURATION: Diameter: See figures 1 and 2. (Diameter requirements are based on selecting fibers with end-point tolerances of 125 1 m from production with a 125 2 m tolerance.) Ovality: Core: 0.75 for a 250 m diameter coating, 0.65 for a 500 m diameter coating. F

8、iber curl: Not applicable. Splices within the optical fiber: Splices within the optical fiber are not allowed. Tensile proof (fiber proof test): 1.38 GPa (200 kpsi). Fiber mass/unit length: 0.1 kg/km maximum for 250 um coating, 0.3 kg/km maximum for 500 um coating. Optical parameters: Change in opti

9、cal transmittance: Measurements to be made at 850 20 nm. Maximum attenuation rate: Spectral attenuation shall be performed at a sufficient number of wavelengths to cover the applicable optical transmission windows and sources for attenuation. Sufficient coverage includes the optical transmission win

10、dows (850 nm, 1,300 nm), ultraviolet absorption band (600 to 870 nm), Rayleigh scattering losses (800 to 1,200 nm), OH impurity absorption peaks (945, 1,249 and 1,383 nm). Use of a source and power meter to perform this measurement is not acceptable. Attenuation rate for wavelengths of operation sha

11、ll not exceed the maximum values listed below. Attenuation rate for wavelengths of operation shall not exceed 3.0 dB/km at 850 20 nm and 0.8 dB/km at 1,300 20 nm. Maximum attenuation over the wavelength range from 800 to 1,600 nm shall be less than 3.5 dB/km. Numerical aperture: 0.200 0.015 at 850 2

12、5 nm. Overfill bandwidth: 1,500 MHz-km at 850 20 nm and 500 MHz-km at 1,300 20 nm. EMBcbandwidth: 1,500 MHz-km at 850 20 nm when measured in accordance with TIA-455-220 including the use of the weightings found in annex D of this TIA standard. Chromatic dispersion: Zero dispersion wavelength shall b

13、e 1,313 18 nm. The value of the slope at the zero dispersion wavelength shall be not greater than 0.11 ps/nm2-km for a zero dispersion wavelength between 1,295 nm to 1,330 nm. Transient attenuation: 1.5 dB at 1300 nm. Attenuation uniformity: Applicable except the attenuation uniformity shall be perf

14、ormed at 850 nm and 1,300 nm. There shall be no discontinuities in attenuation along the length greater than 0.2 dB. Macrobend attenuation: Applicable. Test shall be performed in accordance with 4.7.2.4 and measured in accordance with TIA-455-62, Method B, with optical power measurements obtained fo

15、r each row of parameters in table I. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-49291/12B 4 TABLE I. Macrobend attenuation test parameters. Mandrel diameter mm (Inch) Number of turns around mandrel Measurement wavelength (nm) Macrobend a

16、ttenuation (dB) 30 1 (1.2 .04) 2 1,300 20 1.5 30 1 (1.2 .04) 2 850 25 1.5 20 1 (.79 .04) 1 1,300 20 2.5 20 1 (.79 .04) 1 850 25 2.5 15 .5 (.59 .02) 1 1,300 20 3.5 15 .5 (.59 .02) 1 850 25 3.5 Polarization mode dispersion: Not applicable. ENVIRONMENTAL: Temperature range: See table II. TABLE II. Temp

17、erature range. PIN Operating o C (oF) Nonoperating o C (oF) Storage o C (oF) M49291/12-01 M49291/12-02 1/ -55 to +165 (-67 to 329) -40 to + 85 (-40 to 185) -40 to +85 (-40 to 185) M49291/12-01A M49291/12-02A 2/ -46 to +85 (-51 to 185) -55 to +85 (-67 to 185) -55 to +85 (-67 to 185) 1/ Temperature ra

18、nges in row 2 conform to those specified for other MIL-SPEC fiber optic cabling components for aircraft applications. 2/ 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). Fluid

19、immersion aging: Not applicable. Mechanical strippability: Applicable. In addition to 3.5.3 (when tested to 4.7.2.3), each individual optical fiber shall comply with the following diameter and residue requirements and test methods: Diameter requirement. Requirement that the stripped optical fiber co

20、mplies with diameter B in figure 1 shall be verified by successful 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. Provid

21、ed by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-49291/12B 5 Residual requirement. Requirement that no residual coating material remains on fiber shall be verified by the performance of a fiber pullout test. The end on each stripped length of optica

22、l 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). Fabrication shall be performed as specified in NAVSEA Drawing 8283255. A copy of this document can be obtained at we

23、b 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 tensile load between the optical fiber and the terminus for a minimum duration of one minute. At the completion of the

24、 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 fiber conforming to the requirements of this specification sheet shall be spliced, (using either a fusion splicer or

25、mechanically splice) and connectorized (using MIL-PRF-29504/4 and /5 termini) to optical fiber conforming to MIL-PRF-49291/1. Three sample lengths are to be used for each splice or connector. An insertion loss measurement shall be performed in accordance with method B of TIA/EIA-455-34. The insertio

26、n loss shall not exceed 0.2 dB per splice and 0.5 dB per connector mated pair when performed at a wavelength of 1,300 nm. Dynamic tensile strength: Applicable. Fungus: Applicable. Thermal shock: Applicable as specified for M49291/12-01A and M49291/12-02A (in accordance with 4.8.1 of MIL-PRF-49291).

27、Applicable for M49291/12-01 and M49291/12-02, except that the temperatures of -55C +0/-5 C (-67F +0/-8F) and 165 C +5/-0 C (329F +8/-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 o

28、ptical transmittance shall be measured during (towards the end of each soak temperature) and after the test. Storage temperature: Applicable. Temperature cycling: Applicable as specified for M49291/12-01A and M49291/12-02A (in accordance with 4.8.3 of MIL-PRF-49291). Applicable for M49291/12-01 and

29、M49291/12-02 except for the optical fiber with a -55o C to 165o C (-67F to 329F) temperature range, perform the following in lieu of the 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-S

30、TD-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 minimum for the “during test” measurements, an optical transmittance measurement shall be performed towards the end of each soak period (maintain step) after

31、 every 50 cycles. A post test visual examination of the test specimens shall reveal no surface impairment or any damage detrimental to the operation 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 signifi

32、cant thermal lag) shall be added inside the chamber. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-49291/12B 6 Temperature life: Applicable as specified for M49291/12-01A and M49291/12-02A (in accordance with 4.8.4 of MIL-PRF-49291). Applic

33、able for M49291/12-01 and M49291/12-02, except that the high exposure temperature shall be 165 C +5/-0 C (329F +8/-0F). Test samples shall be tested in accordance with TIA/EIA-455-4 for the duration of 1,000 hours at the high exposure temperature. The change in optical transmittance shall be measure

34、d after the test. The optical fiber shall be visually examined after the test to the extent feasible. Optical fiber shall not be damaged, and there shall be no distortion, cracking of coating, or other damage detrimental to the operation of the optical fiber. The requirement for the change in optica

35、l transmittance shall be met after the test. Performance of a cable/fiber retention test is not required as part of the final inspection for this test. Nuclear radiation resistance: Nuclear radiation resistance requirements and test conditions shall be as shown below and in table III and table IV: L

36、ight launch conditions: In accordance with TIA-455-78. Wavelength: 1,300 25 nm. Source type: LED with FWHM spectral width 160 nm. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-49291/12B 7 TABLE III. Steady state gamma radiation test conditi

37、ons. Test temperature o C Dose rate Total dose (rad Si) 1/ -28 2 25 2 85 2 50 +0, -20 rad (Si)/sec Classified 1/ 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 b

38、e made through the Department of the Navy, Naval Surface Warfare Center, Dahlgren Division, ATTN: Code W13, 17214 Avenue B Suite 125, Dahlgren, VA 22448-5147. Information concerning security clearance classification and “need to know“ must be detailed in the request. TABLE IV. Steady state gamma rad

39、iation test requirements. Maximum induced attenuation (dB/km) Attenuation at specified recovery time (dB/km) Specified recovery time (sec) 50 1/ 15 at -28o C (-18F) 1/ 5 at 25o C (-18F) 5 at 85o C (185F) 1,000 1/ The radiation induced loss for a given threat. The total dose associate with the threat

40、 is classified and not necessarily equal to the test total dose. CONFORMANCE: Test samples for qualification: Reels of optical fiber produced for initial qualification shall be from at least two different preforms (see 4.5.1 of MIL-PRF-49291). Qualification: Qualification shall consist of performing

41、 testing specified in table V. TABLE V. Qualification inspections. Test performed Initial qualification Initial uncoiling preparation Group 1 (3 spools-2 km ea) 1/ Visual and mechanical X OTDR tests: Fiber length X Attenuation uniformity X Parameter tests: Attenuation rate X Numerical aperture (MM o

42、nly) X Core diameter (MM only) X See footnotes at end of table. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-49291/12B 8 TABLE V. Qualification inspections - Continued. Test performed Initial qualification Cutoff wavelength(SM only) Mode f

43、ield diameter (SM only) Transient attenuation (MM only) X Macrobend attenuation X Bandwidth-overfill (MM only) X Bandwidth-RML/EMBc (MM only) X Chromatic dispersion X Polarization mode dispersion (SM only) Fiber curl (SM only) Mass/unit length X Geometry tests: End view: Core ovality (MM only) X Cla

44、dding 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 spools) 1/ Tensile proof X Mechanical strippability X Dynamic tensile strength X Splice compatibility X Grou

45、p 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 strippability (post Temp life) X Group 4(samples off 3

46、 spools) Nuclear radiation resistance 4/ X Fungus resistance X Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-49291/12B 9 NOTES: 1/ See table I in basic specification (MIL-PRF-49291) for specimen lengths. 2/ OOT = Change in optical transmitt

47、ance. 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

48、 1. For mechanical strippability, place in pans and remove from chamber after specified environmental test. Mechanical strippability: each spool, 2 samples, 91.4 cm (3 ft) long. Mechanical strippability-post temp/humidity: each spool, 2 samples, 91.4 cm (3 ft) long. Mechanical strippability-post life aging: each spool, 2 samples, 91.4 cm (3 ft) long. Dynamic tensile strength: each spool, 30 samples, 198.1 cm (6.5 ft) long (no humidity). Nuclear radiation resistance: each spool, 1 sample, 200 meters (165.1 ft) long on spool. Fungus resistance: each spool, 1 sample, 30.5 cm (1 f