Automatic operating point calibration

Details Automatic operating point calibration Automatic operating point calibration

1999-01-08

1999-12-07

Scott, Jr., Leon

Coherent light generators

Particular component circuitry

Optical pumping

H01S 300

Patent

active

059995505

ABSTRACT:
A laser diode driver system automatically tracks the difference between the steady state operating point of a feedback signal in response to a laser diode driver circuit operation and the steady state operating point of the same feedback signal in response to a dummy driver circuit operation. That difference is used to compensate the dummy driver circuit operation such that its operating point correlates with the laser diode driver circuit operation. Further, in accordance with a second aspect of the present invention, a laser diode driver system automatically tracks the difference between the steady state operating point of a feedback signal in response to the quiescent laser diode driver circuit operation and the steady state operating point of the same feedback signal in response to the output of a high frequency oscillator. That difference is used to adjust a variable current source such that a dummy driver circuit is not disabled until the laser diode turn-on time delay has expired. The disablement is extended when the current drawn by the current source changes the discharge time of a capacitor that is connected to the enable signal for the dummy driver circuit.

REFERENCES:
patent: 4903273 (1990-02-01), Bathe
patent: 5761231 (1998-06-01), Ofenloch et al.

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