| 摘要 |
PURPOSE:To facilitate the phase matching by forming the stripes of a plurality of DFB lasers in parallel with each other on one substrate and optically and electrically connecting them in series through the wave-guiding channel of a total reflection mirror part to increase an optical output and besides control a voltage applied to a phase adjusting region. CONSTITUTION:The stripes 2a to 2f of a plurality of DFB lasers are formed in parallel with each other on a semiconductor substrate 1. And light generated from the stripe 2a is wave-guided to the next stripe 2b with a total reflection mirror part 3a (optical connection part) including a wave-guiding channel making use of total reflection, and the total reflection mirrors 3a to 3e are staggered with every two stripes so that the light generated from the stripe 2b is wave- guided to the stripe 2c by the total reflection mirror part 3b. The phase adjusting regions 4a to 4j for matching the phase of diffraction grating of generated light are formed between the respective stripes 2a to 2f and the total reflection mirror parts 3a to 3e. |
