Self-Pulsation in Multisection Distributed Feedback Laser Diode with a Novel Dual Grating Structure

Abstract

A self-pulsating multisection distributed-feedback laser diode (DFB LD) can potentially realize all-optical clock extraction. This device generally consists of three sections, two DFB sections and one waveguide section. The most important variable in this device is detuning, which is the relative spectral position between the stop bands of two DFB sections. We fabricated a novel structure in which two gratings were located one over and one under the active layers. Each grating structure was independently defined in processing so that detuning, which is the prerequisite for self-pulsation, could be easily controlled. Observing various self-pulsating phenomena in these devices under several detuning conditions, we characterized the phenomena as dispersive Q-switching, mode beating, and self-mode-locking.

Continuous-wave THz generation from ingaas-based photomixers pumped by a tunable dual-wavelength DFB laser

“…Various InP-based dual-wavelength laser diodes (LDs) have been developed in order to use in optical communication systems [5,6], however, they all show a limited wavelength tuning range.…”

Fabrication of Butt-Coupled SGDBR Laser Integrated with Semiconductor Optical Amplifier Having a Lateral Tapered Waveguide

“…The lengths of both SG bursts (Z 1 ) were 7 µm, resulting in the wavelength tuning range of approximately 40 nm [7]. The grating burst regions were patterned by holographic lithography and formed by RIE and wet chemical etching [8].…”

10 Gbit s−1electroabsorption modulator integrated with a DBR laser using the selective area growth technique

“…But it is very difficult to vary the period of Bragg reflectors of constituent DFB lasers across the array. So, very complicated approaches are used to fabricate multi-wavelength DFB laser arrays [4,5].…”