Binary modulation of injection lasers
US5287366A · kind A · utility
9Cited by
2References
19Claims
0Family size
Assignee
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Key dates
| Filing date | May 28, 1992 |
| Grant date | Feb 15, 1994 |
| Priority date | — |
| Expiry date | May 28, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/0687
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An injection laser driver regulates the bias and modulation depth by means of two feedback control loops, one deriving its feedback control signal from a measure of the mean optical output of the laser, and the other deriving its feedback control signal from a measure of the spectral purity of that optical output. The spectral purity measure is conveniently effected by measuring the coherence function at a specific value of differential delay using a Mach-Zehnder interferometer configuration with a passive quadrature optical network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.