title: Compact MEMS external cavity tunable laser with ultra-narrow linewidth for coherent detection.
abstract: A compact and ultra-narrow linewidth tunable laser with an external cavity based on a simple single-axis-MEMS mirror is presented in this paper. We discuss the simulation of this tunable laser using a two-step hybrid analysis method to obtain an optimal design of the device. A wide wavelength tuning range about 40 nm in C-band with a narrow linewidth of less than 50 kHz and wavelength accuracy of ± 1 GHz over the entire tuning range can be achieved experimentally. We also conduct several experiments under different conditions to test the tunable laser. This device shows an excellent performance in both single-carrier polarization-multiplexed quadrature phase-shift keying (PM-QPSK) and multi-carrier orthogonal frequency division multiplexing (OFDM) coherent systems.
authors.affiliation: Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology, College of Optoelectronics Science and Engineering, Wuhan, 430074, China.
authors.forename: Di
authors.initials: D
authors.lastname: Zhang
authors.forename: Jianyi
authors.initials: J
authors.lastname: Zhao
authors.forename: Qi
authors.initials: Q
authors.lastname: Yang
authors.forename: Wen
authors.initials: W
authors.lastname: Liu
authors.forename: Yanfeng
authors.initials: Y
authors.lastname: Fu
authors.forename: Chao
authors.initials: C
authors.lastname: Li
authors.forename: Ming
authors.initials: M
authors.lastname: Luo
authors.forename: Shenglei
authors.initials: S
authors.lastname: Hu
authors.forename: Qianggao
authors.initials: Q
authors.lastname: Hu
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D007909:Lenses; D055617:Micro-Electrical-Mechanical Systems / Q000295:instrumentation*; D013685:Telecommunications / Q000295:instrumentation*