Nonlinear optical property of a Bi-doped GaAs semiconductor saturable absorber

Semiconductor Saturable Absorber Mirror (SESAM)

Excitability in a semiconductor laser with saturable absorber.

We show that a monolithic and compact vertical cavity laser with intracavity saturable absorber can emit short excitable pulses. These calibrated optical pulses can be excited as a response to an input perturbation whose amplitude is above a certain threshold. Subnanosecond excitable response is promising for applications to novel all-optical devices for information processing or logical gates.

Phase response characterization of semiconductor saturable absorber for applications in nonlinear optical signal processing and phase- modulated signals regeneration

The phase response of a commercial saturable absorber based on semiconductor quantum wells embedded in a resonant cavity is investigated. The nonlinear absorption change is accompanied by a variation of the spectral phase characteristic. Also, a nonlinear change in the refractive index of the material, induced by the modified carrier density, produces a weak shift in the resonant wavelength of ...

Chapter 5 Regular Q-switching mode locking: Combination of nonlinear mirror and semiconductor saturable absorber mirror

5-1 Motivation Since we demand high peak power and low repetition rate output in Nd:GdVO4 laser using nonlinear mirror absorber and SESAM, in this chapter, the experiment setup is slightly different from the previous ones in Chapters 3 and 4. In order to prevent damage of SESAM at high intra-cavity peak power, SESAM (the same as Chapter 2) is inserted at the position where has a larger radius o...

The Effect of Proton Bombardment on Semiconductor Saturable Absorber Structures

Carrier lifetime reduction resulting from proton bombardment of InGaAs/InP-based semiconductor saturable absorbers was studied experimentally, using a standard degenerate, cross-polarized pump-probe technique. Proton bombardment reduced carrier lifetimes by as much as a factor of 40 at low optical excitation densities. For high fluences, significant induced absorption was observed. The recovery...