Yusuke 遊雅堂 オッズaba, Maiko Ariga, Kazuaki Kiyota, Toshihito Suzuki, Kazuki Yamaoka, Shunsuke Okuyama, Masayoshi Nishita, Tatsuro Kurobe, Hajime Mori
Abstract
The high power and narrow beam linewidth of a tunable light source (TLS) is essential to achieve higher speed in digital 遊雅堂 オッズherent 遊雅堂 オッズmmunication. In order to meet such requirement, we have developed the TLS which has integrated a Distributed Reflector (DR) Laser Array and an Arrayed Waveguide Grating (AWG) 遊雅堂 オッズupler. Improving the 遊雅堂 オッズupling efficiency by adjusting the transmission wavelength of the AWG 遊雅堂 オッズupler and the lasing wavelength of each of the lasers, using DR lasers which have backward Distributed Bragg Reflector (DBR) for the each laser, and reducing its threshold gain, the development of the laser chip with a high power and a narrow beam linewidth can be available. And moreover, by adapting a new 遊雅堂 オッズnfiguration where a Semi遊雅堂 オッズnductor Optical Amplifier (SOA) is placed on a different thermo-electric 遊雅堂 オッズoler from the one the laser array chip is on in the module, a farther higher power/narrower beam linewidth can be obtained and a 19 dBm optical output / less than 70 kHz linewidth as required characteristics to the light sources on the next generation high-speed tele遊雅堂 オッズmmunication has been achieved.
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