Tunable wavelength locker, tunable wavelength spectrum...

Details Tunable wavelength locker, tunable wavelength spectrum... Tunable wavelength locker, tunable wavelength spectrum...

2006-11-21

2006-11-21

Harvey, Minsun Oh (Department: 2828)

Coherent light generators

Particular beam control device

Tuning

C372S029014, C372S029016

Reexamination Certificate

active

07139295

ABSTRACT:
A system for tuning the wavelength of a beam from a tunable laser. A tunable etalon assembly includes a Fabry-Perot etalon with paired reflectors to filter the laser beam. The tunable etalon also includes a thermal unit to thermally adjust the separation of the paired responsive to an etalon tuning signal. A photodetector receives the laser beam after filtering the etalon and generates a detected signal based on intensity. A controller generates the etalon tuning signal, and receives the detected signal and generates a laser tuning signal based on it. Optionally, additional Fabry-Perot etalons, photodetectors, and one or more beamsplitters permit extending wavelength range and determining relative wavelength difference with a beam from a second laser.

REFERENCES:
patent: 6518563 (2003-02-01), Broutin et al.
patent: 6888856 (2005-05-01), Green et al.
patent: 2001/0017876 (2001-08-01), Kner et al.
patent: 2003/0174743 (2003-09-01), Cliche et al.

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