Wavelength-varying multi-wavelength optical filter laser using a

Details Wavelength-varying multi-wavelength optical filter laser using a Wavelength-varying multi-wavelength optical filter laser using a

1994-12-19

1996-06-04

Bovernick, Rodney B.

Coherent light generators

Optical fiber laser

372 22, 372 23, 372 97, H01S 330

Patent

active

055241182

ABSTRACT:
A wavelength-varying multi-wavelength optical filter laser using a single pump light source is disclosed. The laser comprises a wavelength-division multiplexing coupler for applying an output from a single pump light source, a first multi-branch optical fiber coupler for branching the light from the single pump light source into a plurality of optical paths, an erbium-doped fiber located at each of optical paths, wavelength-varying optical filters located at rear of each erbium-doped fiber in each optical paths, said wavelength-varying optical filters for generating laser outputs of different wavelengths in each optical paths, optical isolators located between the erbium-doped fiber and the wavelength-varying optical filter in each optical paths, said optical isolators for reducing interference between laser outputs to be stable, optic attenuators located at rear of the wavelength-varying optical filter in each optical paths, said attenuators for regulating a mode beating between laser outputs of different wavelengths, thereby causing the multi-wavelength laser oscillation to be possible, a second multi-branch optical fiber coupler for coupling branched-optical paths, and a variable optical fiber coupler located at rear of the second multi-branch optical fiber, said variable optical fiber coupler for regulates a coupling ratio of the second variable optical fiber coupler, thereby making the output thereof to be maximum.

REFERENCES:
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patent: 5233619 (1993-08-01), Furuhashi et al.
patent: 5311603 (1994-05-01), Fidric
patent: 5337375 (1994-08-01), Nyman et al.
Dawson, Jay W. et al.: "Co-lasing in an electrically tunable erbium-doped fiber laser"; pp. 3090-3092, Jun. 22, 1992; Applied Phys. Lett. 60(25). American Inst. of Physics.
Park, Namkyoo et al: "Multiple wavelength operation of an erbium-doped filter laser"; 2 pgs. article; Mar. 16, 1992; IEEE log No. 9200540.
Poustie, Jr. Alistair J. et al.: "Multiwavelength fiber laser using a spatial mode beating filter"; pp. 716-718, May 15, 1994; Optics Letters, vol. 19, No. 10.

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