Dual-mode laser diode transmitter

Details Dual-mode laser diode transmitter Dual-mode laser diode transmitter

1991-04-05

1992-12-29

Coles, Sr., Edward L.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

372 38, 250205, H04B 1004

Patent

active

051756412

ABSTRACT:
A semiconductor injection laser diode is coupled via a switch to two drivers. One driver provides a drive current above the threshold current required to cause the injection laser diode to lase. The other driver provides a drive current below this threshold current, causing the laser diode to operate in a light-emitting diode (LED) mode. The switch couples the laser diode to one or the other of the drivers depending upon the receiver to which the transmitter is coupled.

REFERENCES:
patent: 4558465 (1985-12-01), Siegel et al.
patent: 4592057 (1986-05-01), Comerford
patent: 4612671 (1986-09-01), Gites
patent: 4718118 (1988-01-01), Viola
patent: 4837428 (1989-06-01), Takagi et al.

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