Optical source with reduced relative intensity noise

Details Optical source with reduced relative intensity noise Optical source with reduced relative intensity noise

1992-07-27

1994-03-08

Chin, Wellington

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359161, 359180, 359181, 359188, H01S 310, H01S 3102

Patent

active

052935450

ABSTRACT:
Apparatus is provided for producing an optical carrier with low relative intensity noise. A portion of light output from a light source is sampled. An error signal representative of the relative intensity noise contained in the light output is generated. The error signal is subtracted from the light output from the light source to provide an optical carrier in which the relative intensity noise has been substantially reduced. The error signal can be subtracted using either an external optical intensity modulator or by converting the electrical signal to an optical signal and directly coupling it to the light output from the light source.

REFERENCES:
patent: 4287606 (1981-09-01), Lutes, Jr. et al.
patent: 5073983 (1991-12-01), Pfizenmayer
patent: 5126871 (1992-06-01), Jeffers
patent: 5128950 (1992-07-01), Tsuchiya et al.

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