Wavelength synchronization technology for UDWDM-PON transmitter based on injection locking

Abstract

We propose a concept of wavelength synchronization to ensure the stability of ultra-dense channels in an ultra-dense wavelength division multiplexing passive optical network (UDWDM-PON) transmitter. A mode-locked laser is used to provide wavelength references for users. By injection locking the semiconductor laser, the separation of the wavelength reference is realized in an optical line terminal. The downlink and uplink wavelength references are interlaced and distributed to facilitate the synchronization of uplink carriers. In the optical network unit, the uplink optical carriers are filtered by injection locking semiconductor lasers, which achieve wavelength synchronization for the uplink users. In this Letter, an adaptive wavelength synchronization transmitter for UDWDM-PON is realized with a channel spacing of 5 GHz.

Widely Tunable and Narrow Linewidth Laser Source based on Normal-Dispersion Frequency Combs and Optical Injection Locking

“…Similar results have been seen when injection locking mode locked lasers with ultra-dense mode spacing [21]. That being said, these approaches suffer from low optical and electrical efficiency, the wasting of comb lines due to a mismatch in the optical tuning range of the slave laser and the FSR of the comb, major inconsistencies in injection ratio due to the fact that the combs used do not have a flat spectral profile, and the inability to produce optical tones at an arbitrary frequency.…”

Comparative study an effect of polymethyl methacrylate coating on optical microbottle resonator for enhancing sensing performance for ethanol liquid sensor

“…[9][10][11] The number structure of OMR is proposed, such as microring, microloop and microsphere. [12][13][14] By concepts, WGMs spatially moved crossed the resonator axis, allowing high optical forces that helped to expand photon lifetime and increase the quality of the mode. Due to low intrinsic losses and minimal assembly method, the research on OMR increased its popularity to be explored wider.…”

“…The OMR works by exploiting the whispering gallery modes (WGsM), which was then utilized in laser technology sensing applications in plasmonic devices 9–11 . The number structure of OMR is proposed, such as microring, microloop and microsphere 12–14 . By concepts, WGMs spatially moved crossed the resonator axis, allowing high optical forces that helped to expand photon lifetime and increase the quality of the mode.…”