| 摘要 |
<p>Disclosed herein are an optical transmission system having light sources for wavelength division multiplexing communication adapted to the standard wavelength channels and an optical transmitter having an external modulator monolithically integrated. The optical transmission system has an optical transmitter as a light source for optical signal. The optical transmitter includes a semiconductor waveguide region including a distributed reflection type first optical feedback device, an emission region, and an optical absorption region integrated together, and a second optical feedback device formed independently of the semiconductor waveguide region in opposed relationship to an end surface of the semiconductor waveguide region opposite to the first optical feedback device. Optical modulation is performed in the optical absorption region. With this configuration, long-haul wavelength division multiplexing transmission can be easily realized. <IMAGE></p> |
