Coherent light generators – Particular component circuitry – Optical pumping
Patent
1988-02-17
1990-02-20
Gonzalez, Frank
Coherent light generators
Particular component circuitry
Optical pumping
372 29, H01S 300
Patent
active
049032739
ABSTRACT:
The operation of laser diodes requires a preset operating point. Owing to the spread in the characteristic curves of laser diodes, a costly adjustment is required for accurately determining this operating point, more specifically after each exchange of a laser diode. By using a control circuit, the operating point is positioned in the portion of the characteristic curve in which the ratio of the slope of the characteristic curve to the slope of the characteristic curve in the linear portion of the characteristic curve is equal to a predetermined value. This ratio is obtained by measuring the change in the bias current, which compensates for a power change caused by a change of the modulation current.
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Biren Steven R.
Gonzalez Frank
U.S. Philips Corp.
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