Single facet semiconductor laser with deep etched V-notch reflectors integrated with an active multimode interference reflector

Abstract

A single mode laser based on novel deep etched V-notch reflectors is presented in this paper. The reported device has a stable single mode operation and a side mode suppression ratio of 37 dB. The laser is widely tunable and it can be fine-tuned. Moreover, the laser cavity is monolithically integrated with an active multimode interference reflector, and has a total length of 860 µm. ARTICLE HISTORY

Regrowth-free single-mode semiconductor laser suitable for monolithic integration based on pits mirror

“…These lasers achieve single-mode operation using various approaches, such as coupled cavities 9,10 and multiple semiconductor ring lasers, 11,12 or exploit mini reflections from index perturbation to create subcavities, such as slotted Fabry-Perot (SFP) lasers. [13][14][15] They provide a high side-mode suppression ratio (SMSR) that can exceed 40 dB, a wide tuning range covering the C + L bands, fine tuning step <21 pm∕mA, 16 and output power over 25 mW. 14 Moreover, in addition to their relatively simple fabrication process, they provide a narrow linewidth that has become a necessity for high spectral density, coherent optical communications.…”