Laser diodes for optical readout of cryo-electronics

Details Laser diodes for optical readout of cryo-electronics Laser diodes for optical readout of cryo-electronics

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spie.2226...50b&link_type=abstract

Proc. SPIE Vol. 2226, p. 50-59, Infrared Readout Electronics II, Eric R. Fossum; Ed.

Physics

Scientific paper

We report successful coupling of electrical signals from low temperature (4.2 K) superconducting circuitry to room temperature electronics using laser diodes coupled to optical fibers. The techniques used rely on laser diodes operating at low temperatures, and on high gain amplifiers placed outside the low temperature environment. A new superconducting driver circuit is used to step-up the low output of these circuits to a seven millivolt level, sufficient to modulate the laser diodes. By properly choosing the laser source, the power dissipated within the cryogenic environment can be maintained below 400 (mu) W, with further improvements easily reached.

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