Coherent light generators – Laser logic system
Patent
1982-03-29
1986-05-27
Sikes, William L.
Coherent light generators
Laser logic system
372 31, 372 38, 372 26, 250205, 455618, 455611, H01S 330
Patent
active
045920575
ABSTRACT:
Drive current for a light emitting semiconductor device, such as an injection laser, is supplied by a digitally programmable current source capable of supplying any one of a plurality of different discrete current amplitudes. Light emitted by the device is sensed and an amplitude parameter (e.g. instantaneous current or power amplitude, average current or power amplitude, modulation amplitude, etc.) is digitally encoded. A logic circuit responsive to the digitally encoded amplitude parameter and optionally responsive to other digital signals as well, controls the discrete current amplitude supplied by the programmable current source.
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Hnatek, "A User's Handbook of D/A and A/P Converters", John Wiley & Sons, ISBN-0-471-40109-9, pp. 88 and 89.
Drumheller Ronald L.
International Business Machines - Corporation
Jr. Leon Scott
Sikes William L.
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