Wavelength tunable light source

Details Wavelength tunable light source Wavelength tunable light source

2005-02-01

2005-02-01

Wong, Don (Department: 2821)

Coherent light generators

Particular beam control device

Tuning

C372S099000, C372S102000

Reexamination Certificate

active

06850545

ABSTRACT:
There is provided a wavelength tunable light source10in which one end surface1aof a semiconductor laser1is applied anti-reflection film, a lens6collimates a light beam emitted from the one end surface1aof the semiconductor laser1onto which the anti-reflection film is applied, and a wavelength selection portion constituted by a combination of a diffraction grating2and a mirror3selects a light beam having a desired wavelength to return the selected light to the semiconductor laser1to make laser oscillation. A center of rotation of the mirror3is provided in a position P0where mode hopping can be suppressed when the wavelength is tuned and rotation of the mirror3is driven by a direct drive system by using a motor4having a rotation shaft4ain the center of rotation of the mirror3.

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