High repetition rate driver circuit for modulation of injection lasers

Patent · Tue Jan 06 00:00:00 EST 1981

OSTI ID:6195949

Dornan, B R; Goel, J; Wolkstein, H J

An injection laser modulator comprises a self-biased field effect transistor (FET) and an injection laser to provide a quiescent state during which lasing of the injection laser occurs in response to a high repetition rate signal of pulse coded modulation (pcm). The modulator is d.c. coupled to an input pulse source of pcm rendering it compatible with an input pulse referenced to ground and not being subject to voltage level shifting of the input pulse. The modulator circuit in its preferred and alternate embodiments provides various arrangements for high impedance input and low impedance output matching. In addition, means are provided for adjusting the bias of the FET as well as the bias of the injection laser.

• Assignee: RCA Corp
• Patent Number(s): US 4243951
• Application Number: TRN: 81-015323
• OSTI ID: 6195949
• Resource Relation: Patent File Date: Filed date 12 Jun 1978
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
LASERS
CONTROL SYSTEMS
MODULATION
ELECTRONIC CIRCUITS
FIELD EFFECT TRANSISTORS
INJECTION
PULSES
INTAKE
SEMICONDUCTOR DEVICES
TRANSISTORS
420300* - Engineering- Lasers- (-1989)
420800 - Engineering- Electronic Circuits & Devices- (-1989)