Multi-wavelength gain-coupled distributed feedback laser array with fine tunability
 A multi-wavelength laser array having a plurality of gain-coupled distributed feedback ridge waveguide lasers. The operational wavelength of each laser is established by selecting a width of the ridge waveguide in the range 1.6 .mu.m to 5.2 .mu.m. Fine tuning of each central wavelength is achieved by thermal power to selected waveguides via Titanium thin film resistors integrated into the laser array. A wavelength range of 9 nm is demonstrated utilizing a sixteen element array. 
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Toshihiko Guo P. Andrew M. Weiping
Makino Li Sarangan Huang