Cost-effective Half-duplex Transceivers for Fiber-to-the-Room Network Enabled by Optical Feedback Resistant Single-mode Lasers

Mode locking in semiconductor lasers by phase-conjugate optical feedback.

We show theoretically through computer simulations that phase-conjugate optical feedback that is realized through four-wave mixing can produce mode locking in multilongitudinal-mode semiconductor lasers. Phase-conjugate feedback, in contrast to ordinary optical feedback, directly couples pairs of longitudinal modes. For certain strengths of phase-conjugate reflectivities, the phases and beat fr...

Mode Locked Fiber Lasers

Mode - locked fiber ring lasers with semiconductor optical

This thesis is on the development of high-speed pulsed lasers at wavelengths around 1.55 m for applications in the fiber optic communications field. The realization of future optical transmission systems and signal processing circuits will require such optical pulse sources, capable of producing picosecond pulses with a low timing jitter at repetition rates of tens or even hundreds of Gigahertz...

Mode division multiplexed optical transmission enabled by all-fiber mode multiplexer.

Mode division multiplexed optical transmission enabled by all-fiber mode multiplexer is investigated. The proposed all-fiber mode multiplexer is composed of consecutive mode selective couplers. It multiplexes or demultiplexes LP01, LP11, LP21, and LP02 modes simultaneously. We demonstrate successful transmission of three spatial modes with 120 Gb/s PDM-QPSK signals over 15 km of four mode fiber...

Internal and External Optical Feedback Effect in Fiber Linear Lasers

In this paper, models of internal and external optical feedback effect in fiber linear lasers have been presented. The effects of optical feedback could be equivalent to the variation of laser cavity loss, and the output expressions of two models are deduced. According to the simulation results, the optical feedback system in fiber linear lasers has the same phase sensitivity as the traditional...