Abstract
A monolithically integrated digitally tunable laser has been developed, in which a ladder filter and a ring resonator are integrated with a semiconductor optical amplifier. In this device, the widely tunable ladder filter selects one channel from the periodic channels of the ring resonator. The device exhibited 37- channel 100-GHz-spacing digitally tunable laser operation. To improve the device performance, we developed a tunable laser incorporating a chirped ladder filter, in which we obtained one dominant passband.
© 2005 Optical Society of America
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