Light frequency control apparatus

Details Light frequency control apparatus Light frequency control apparatus

1994-12-27

1996-12-03

Chin, Wellington

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359122, 359124, H04B 1000, H04J 1406

Patent

active

055813895

ABSTRACT:
The present invention provides light frequency control apparatus comprising a light pulse signal generating mechanism for generating a light pulse signal of a standard frequency; a light frequency shifting mechanism for circulating this light pulse signal a predetermined number of times, delaying this light pulse signal at each cycle thereby sequentially shifting and outputting the aforementioned light pulse signal; an extracting mechanism for extracting a light pulse signal in the second half of a cycle from the output of the light frequency shifting mechanism; and a polarization control mechanism inserted into the light frequency shifting mechanism for controlling the angle of polarization of the light pulse signal circulating in the light frequency shifting mechanism based on the amount of attenuation of the light pulse signal outputted by the extracting mechanism.

REFERENCES:
patent: 4879763 (1989-11-01), Wood
K. Shimizu et al., "Frequency-Difference Stabilization of Distributed-feedback laser diodes by use of an optical frequency translation circuit," Optics Letters, vol. 18, No. 21, pp. 1819-1820 (Nov. 1, 1993).

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