Wideband Analog Fiber Optic Signal Link For Use In The Space/Radiation Simulator Environment

J. Blackburn; J . Vanderwall; R . Gilbert; V. Holliday

doi:10.1117/12.932450

22 January 1982 Wideband Analog Fiber Optic Signal Link For Use In The Space/Radiation Simulator Environment

J. Blackburn, J . Vanderwall, R . Gilbert, V. Holliday

Proceedings Volume 0296, Fiber Optics in Adverse Environments I; (1982) https://doi.org/10.1117/12.932450
Event: 25th Annual Technical Symposium, 1981, San Diego, United States

Abstract

The report describes a wideband linear response fiber optic transmission link designed to telemeter signals from a system being irradiated in a space/radiation simulator. The environment is severe: the transmitter must withstand an x-ray pulse delivering 109 rad(Si)/sec (surface dose rate), beams of 300 - 1000 KeV electrons, hard vacuum, and liquid nitrogen temperatures without degradation or even momentary upset. Radiation hardness is achieved by a combination of circuit design and high-Z shielding, including an optical fiber shield made of non-conducting lead-loaded. polyethylene. Special heat. conducting and insulating measures are employed to maintain temperature. The transmitter measures 15 x 8.5 x 9.5 am and operates on self-contained batteries. Signal bandwidth is greater than 10 KHz to 400 MHz with approximately 35 dB, of dynamic range. Signal inputs ranging from one millivolt to several volts are accommodated; four single-or double-ended inputs are provided, with remote selection. The single-fiber coupled remote control also allows adjusting input. attenuation, power and calibrator control, and verification of transmitter function. The single-mode laser used as the high frequency optical source is microwave dither-blased1 to reduce modal noise.

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J. Blackburn, J . Vanderwall, R . Gilbert, and V. Holliday "Wideband Analog Fiber Optic Signal Link For Use In The Space/Radiation Simulator Environment", Proc. SPIE 0296, Fiber Optics in Adverse Environments I, (22 January 1982); https://doi.org/10.1117/12.932450

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KEYWORDS

Transmitters

Fiber optics

Electronics

Nitrogen

Analog electronics

Electron beams

Liquids

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