Broadband-tunable external fiber-cavity laser

Details Broadband-tunable external fiber-cavity laser Broadband-tunable external fiber-cavity laser

1987-01-20

1990-04-03

Gonzalez, Frank

Coherent light generators

Particular beam control device

Tuning

350 9615, G02B 626, H01S 310

Patent

active

049146653

ABSTRACT:
A broadband-tunable external fiber-cavity laser system includes a laser diode, and a single-mode optical fiber with an in-line fiber optic grating filter. The grating filter includes a grating with divergent ridges so that the periodicity at an exposed evanescent field can be adjusted by translating the grating transversely with respect to the fiber. The evanescent field of light transmitted along the fiber core is accessed at a side-polished region. The laser preferentially oscillates at the reflected wavelength, so that the laser output is tuned by moving the grating. The grating is manufactured by oblique exposure to a holographic wavefront, producing the divergent pattern.

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"Tunable Fibre-Extended-Cavity Laser", Electronic Letters, 3/26/87; vol. 23 No. 7; Whalen et al; pp. 31-314.
"Wavelength-Tunable Single-Mode Fibre Grating Reflector", Electronic Letters, 11/20/86; vol. 22, No. 24; Whalen et al; pp. 1307-1308.

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