External cavity laser tuning element dither servo control

Details External cavity laser tuning element dither servo control External cavity laser tuning element dither servo control

2006-12-29

2008-12-23

Nguyen, Dung T (Department: 2828)

Coherent light generators

Particular beam control device

Tuning

C372S025000, C372S029014

Reexamination Certificate

active

07468996

ABSTRACT:
According to embodiments of the present invention, an external cavity laser includes one or more tuning elements. At least one modulated voltage signal or dither is used to lock the transmission peak of the two tuning elements to each other. The wavelength of the laser also may lock onto the lock transmission peaks. In embodiments in which two dither signals are used, the dither signals may be orthogonal to or independent of each other. The two dither signals may produce two control signals to align the transmission peak of one filter to the transmission peak of another filter and the lasing mode of the laser to the aligned filters.

REFERENCES:
patent: 6600760 (2003-07-01), Green et al.
patent: 6631146 (2003-10-01), Pontis et al.
patent: 6661815 (2003-12-01), Kozlovsky et al.
patent: 6917632 (2005-07-01), Koller et al.
patent: 6927377 (2005-08-01), Chapman
patent: 6940881 (2005-09-01), Pontis et al.

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