Tunable blue laser diode

Details Tunable blue laser diode Tunable blue laser diode

1996-03-29

1997-07-01

Scott, Jr., Leon

Coherent light generators

Particular beam control device

Tuning

372 22, 372 34, 372102, 372 92, 372 64, 372 28, 372 36, 372 6, 372 75, 372 96, H01S 310

Patent

active

056445849

ABSTRACT:
A harmonic generator laser system which features a distributed Bragg reflector (DBR) or distributed feedback (DFB) tunable diode laser coupled to a quasi-phasematched (QPM) waveguide of optically nonlinear material. Tuning of the DBR laser may be achieved either thermally or via current injection, or both, halving the wavelength of a red laser into the visible blue spectral band. Thermal tuning may provide a coarse tuning adjustment, while injected current may provide fine tuning accessible to a user. Separately or in combination with current tuning, a modulation signal may be applied to the DBR laser for achieving an intensity modulated or a pulsed output. In another embodiment, modulation may be achieved by frequency modulation of the laser. A very compact tunable blue laser is formed. In yet another embodiment a double clad fiber amplifier is disposed between the tunable laser and the waveguide. The fiber amplifier is pumped by a high power laser, while the core guides light to be frequency doubled in the nonlinear material from a continuously tunable laser.

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J. T. Lin, Lasers and Optronics, Dec. 1990, pp. 34-40.

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