Coherent light generators – Particular component circuitry – Optical pumping
Patent
1994-05-02
1995-05-02
Scott, Jr., Leon
Coherent light generators
Particular component circuitry
Optical pumping
372 29, H01S 300
Patent
active
054126770
ABSTRACT:
A laser diode is disclosed which utilizes a feedback system which substantially reduces the dependency of the optical output power of the laser diode on laser junction temperature which is dependent on the pixel pattern. The feedback system of this invention generates a feedback signal through comparison of an averaged train of pixel information against an averaged optical output power from the back photodiode of the laser diode. By comparing the two averaged signals, one can determine the fluctuations of the heat in the laser diode. At any given point, any discrepancy between the two averaged signals shows a temperature change in the laser diode. Depending on the amount of the difference between the two signals, the degree of excess temperature can be determined and the difference will be used for feedback correction.
REFERENCES:
patent: 4528525 (1985-07-01), Eden et al.
Guerin Jean-Michel
Wechsler Erwin R.
Jr. Leon Scott
Rad Fariba
Xerox Corporation
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