Coherent light generators – Particular beam control device – Modulation
Patent
1980-07-07
1982-11-16
Sikes, William L.
Coherent light generators
Particular beam control device
Modulation
372 29, 372 43, H01S 310
Patent
active
043597734
ABSTRACT:
A plurality of semiconductor lasers (431-434) and a photodetector (120) are mounted on a silicon substrate (100) having an integrated circuit (101) fabricated therein. The integrated circuit includes a biasing circuit (405) for establishing a threshold current level that is dependent on the output of the photodetector and a modulator circuit (404) for providing a modulation current that is dependent on the digital values in an input signal. A semiconductor switch (406) selects only one of the plurality of semiconductor lasers for activation by the biasing and modulator circuits. The integrated circuit also includes a circuit (408) that operates the semiconductor switch so as to selectively activate a different one of the plurality of semiconductor lasers in response to either a predetermined output from said photodetector or in response to an external supervisory signal.
REFERENCES:
patent: 4009385 (1977-02-01), Sell
patent: 4019048 (1977-04-01), Maione et al.
patent: 4168427 (1979-09-01), Hubbard
"GaAs Laser Source Package for Multichannel Optical Links"; Crow et al.; Optical Fiber Trans. II Tech. Digest by Opt. Soc. of America 1977, 22-24 Feb.
"GaAlAs Laser Transmitter for Lightwave Trans. Systems"; Shumate et al., Bell Syst. Tech. Jour.; vol. 57, No. 6; Jul.-Aug. 1978, pp. 1823-1836.
"Electronic Circuits for High Bit Rate Digital Fiber Opt. Comm. Systems", by Gruber et al., IEEE Trans. on Communications, vol. COM-26, No. 7, Jul. '78, pp. 1088-1098.
"Simultaneous Feedback Control of Bias and Modulation Currents for Injection Lasers", by Chen; Electronics Letters, vol. 16, No. 1, Jan. '80, pp. 7-8.
"Transmitter Feedback Techniques Stabilize Laser-Diode Output", by Svacek, Electronics Design News; Mar. 1980, pp. 107-110.
"Star Couplers Using Fused Biconically Tapered Multimode Fibers", Rawson et al., Electronics Letters, vol. 14, No. 9; 1978, pp. 274-275.
"Fiber-Optic Cable to go to Sea for Phone Company", by Hindin Electronics, Mar. 1980, pp. 39-40.
Swartz Robert G.
Tien Ping K.
Wooley Bruce A.
Bell Telephone Laboratories Incorporated
Dubosky Daniel D.
Jr. Leon Scott
Pfeifle Erwin W.
Sikes William L.
LandOfFree
Semiconductor lasers with selective driving circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Semiconductor lasers with selective driving circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Semiconductor lasers with selective driving circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1438557