학술논문
Monolithic Optical Injection Locking DFB Lasers Based on Four Phase-Shifts Sampling Sections
Document Type
Conference
Source
2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2023 Conference on. :1-1 Jun, 2023
Subject
Language
ISSN
2833-1052
Abstract
Optical injection locking has shown many advantages such as reducing the noise of a slave laser, reducing the laser linewidth, improving the bandwidth and suppressing the frequency chirp [1], [2]. Achieving a locked state often requires a tunable external cavity laser or a well-matched DFB laser since the operating wavelength and polarization of the master laser and the slave laser must be matched. In this paper, we demonstrate a monolithic optical injection locking (MOIL) DFB laser based on four phase-shifts (4PS) sampling sections. Based on the 4PS structure, the lasing wavelength can be precisely controlled by designing the sampling period, meanwhile, the effective grating coupling coefficient K of the +1 st channel is significantly enhanced, equal to 0.9 times that of a uniform seed grating [3]. The device is based on a sidewall grating structure, requiring only one metalorganic vapor-phase epitaxy (MOVPE) step and one III-V material etching step to complete the fabrication process.