Coherent light generators – Particular component circuitry – Optical pumping
Patent
1998-02-27
1999-12-14
Lee, John D.
Coherent light generators
Particular component circuitry
Optical pumping
H01S 3103
Patent
active
060026995
ABSTRACT:
To offer a semiconductor laser drive circuit which can realize high-speed driving of the semiconductor laser. The drive current supply circuit consists of at least 2 diodes D101 and D102 which are connected in series from the bases of the current supply transistors N102 and N103 in a forward direction for the signal output line; data input circuit, which maintains the signal output node ND30 at ground potential when the input signal is at a high-level and maintains the signal output node ND30 at the level of the power supply voltage Vcc when it is at a low level; and a quick-start circuit 50, which consists of a Schottky diode DX501 whose anode is connected to the bases of the current supply transistors N202 and N203 of the bias circuit 20, and a transistor N501 whose base is connected to the cathode of the Schottky diode DX501, whose emitter is connected between the connection point between the 2 diodes D101 and D102, and the collector is connected to the collector of the current supply transistor N103.
REFERENCES:
patent: 5513197 (1996-04-01), Koishi
patent: 5598040 (1997-01-01), Markis
patent: 5651017 (1997-07-01), Genovese
patent: 5793786 (1998-08-01), Furumiya
Donaldson Richard L.
Kempler William B.
Lee John D.
Texas Instruments Incorporated
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