Optical characterization of semiconductor saturable absorbers

Ultrafast dynamics in field-enhanced saturable absorbers

Absorption recovery dynamics of GaAs/AlGaAs field-enhanced waveguide saturable absorbers-are studied by pump-probe differential transmission measurements. We c;ompare the response of-bulk and single quantum well absorbers at different reverse bias levels and pump powers, and find an ultrafast transient in the response, followed by a slower rise before the final recovery. The absorption fully re...

Passive mode-locking in semiconductor lasers with saturable absorbers bandgap shifted through quantum well intermixing

2D Saturable Absorbers for Fibre Lasers

Two-dimensional (2D) nanomaterials are an emergent and promising platform for future photonic and optoelectronic applications. Here, we review recent progress demonstrating the application of 2D nanomaterials as versatile, wideband saturable absorbers for Q-switching and mode-locking fibre lasers. We focus specifically on the family of few-layer transition metal dichalcogenides, including MoS2,...

Semiconductor Saturable Absorber Mirror (SESAM)

Synthsis of Ag2O2 Semiconductor Micropowder by Plasma Electrolysis Methode and its Optical Characterization

Plasma electrolysis is a novel method for synthesis and processing of materials and nanomaterials, which uses plasma-solution interaction. In this paper, a simple setup of pin-to-solution electrical discharge with aqueous solution of silver nitrate in normal air is used. Experimental observations show that by start of electrical discharge and formation of air plasma between metal pin and soluti...