Laser transmitter for reduced SBS

Details Laser transmitter for reduced SBS Laser transmitter for reduced SBS

1997-10-20

1999-11-23

Negash, Kinfe-Michael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359180, 372 96, 385 14, H04B 1001, H04B 1012, H01S 308

Patent

active

059910615

ABSTRACT:
A tunable semiconductor laser comprises a gain section having an MQW active region, a uniform pitch grating DFB region, and first waveguide. A composite reflector, including a second MQW region and a second waveguide, forms a cavity resonator with the DFB region. A tuning voltage applied to the composite reflector induces refractive index changes, thereby allowing the center wavelength to be altered. A dither signal applied the composite reflector broadens the spectrum of the laser output, thereby reducing SBS in fiber optic systems.

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