Radiation hard Multimode Fibers

j-fiber’s porfolio of radiation hard Multimode fibers supports bandwidth intense applications of up to 10 Gb/s transmission rates with demand for fibers that withstand irradation while offering best connectivity features.

Radiation hard Multimode fibers overview

Geometrical Characteristics	OptiGrade R.H. 150	OptiGrade R.H. 300	Graded Index MMF 50/125 R.H.	Graded Index MMF 62.5/125 R.H.	Unit
Core diameter	50 +/- 2.5	50 +/- 2.5	50 +/- 2.5	62.5 +/- 2.5	µm
Cladding diameter	125 +/- 2.0	125 +/- 2.0	125 +/- 2.0	125 +/- 2.0	µm
Coating diameter	245 +/- 10 or 500 +/-15	245 +/- 10 or 500 +/-15	245 +/- 10 or 500 +/-15	245 +/- 10 or 500 +/-15	µm

 

Optical Characteristics		OptiGrade R.H. 150	OptiGrade R.H. 300	Graded Index MMF 50/125 R.H.	Graded Index MMF 62.5/125 R.H.	Unit
Bandwidth (OFL)	at 850 nm at 1300 nm	≥750 ≥ 500	≥ 1500 ≥ 500	400 400	300 600	MHz.km
Bandwidth (EMB)	at 850 nm	> 1000	> 2000			MHz.km
Link lengths	at 850 nm at 1300 nm	150m/10Gb/s 150m/10Gb/s	300m/10Gb/s 300m/10Gb/s
Numerical Aperture		0.200 +/- 0.015	0.200 +/- 0.015	0.200 +/- 0.015	0.275 +/- 0.015

 

Continuous Irradiation		OptiGrade R.H. 150	OptiGrade R.H. 300	Graded Index MMF 50/125 R.H.	Graded Index MMF 62.5/125 R.H.	Unit
Irradiation dose		22rad/s 0.22Gy/s	22rad/s 0.22Gy/s	23rad/s	23rad/s
Max.dose		1-105rad/ 1.103Gy	1-105rad/ 1.103Gy	1-105rad/ 1.104Gy	1-105rad/ 1.104Gy
Induced attenuation	at 835 nm at 1307 nm	20.8 1.2	20.8 1.2	<1450 <40	<1450 <40	dB/100m

 

Pulsed Irradiation		OptiGrade R.H. 150	OptiGrade R.H. 300	Graded Index MMF 50/125 R.H.	Graded Index MMF 62.5/125 R.H.	Unit
Irradiation dose		2700rad/27Gy	2700rad/27Gy	2700rad/27Gy	2700rad/27Gy
Pulse duration		50	50	50	50	ns
Induced attenuation	at 835 nm at 1307 nm	0.96 dB/100m 0.12 dB/100m	0.96 dB/100m 0.12 dB/100m	<0.5 dB/km (at 1310nm)	<0.5 dB/km (at 1310nm)

 

OptiGrade R.H. has been designed to provide high bandwidth10 Gb/s transmission and withstand hazards from radiation threatened environments. The fibre features a graded index configuration with 50/125 core/clad design and has been optimized for use in 850nm wavelenths operation.

Features. Benefits.

Low attenuation change under radiation exposure

• Highest bandwidth with guaranteed transmission at 10Gb/s data rates up to 300m distance
• Allows the use of low cost 850nm VSCELs
• Provides high performance at overfilled launch (OFL) bandwidth of up to 1500 MHz∙km @ 850 nm and 500 MHz∙km @ 1300 nm
• 50µm core allows for high coupling efficiency
• Excellent compatibility in all cable constructions, such as tight buffer and loose tube

Applications.

Bandwidth intense applications which exposes the fiber to radiation, such as:

• Retrieval applications such as video coverage of news events
• space-borne structure monitoring
• Medical imaging programs
• Passive media in communication centers of civil nuclear power stations
• For use in tactical cables in military communication systems

Graded Index Multimode fiber R.H. is the radiation hard Multimode fiber which is available in core sizes of 50µm, 62.5µm, and 100µm and an optional 500µm coating for use in harsh environments such as in military applications.

Features. Benefits.

• Lowest attenuation changes under radiation exposure
• High bandwidth, suitable for high data rates
• Easy handling and splicing
• Available in standard Multimode fiber designs
• Optional 500µm coating for harsh environments

Applications.

• Military
• Aerospace
• Sensors
• Industrial