When dealing with pulses, a fast saturable absorber is one with a recovery time well below the pulse duration, whereas a slow absorber is one with a recovery time well above the pulse duration. This means that the same device may be either a fast absorber or a.
We demonstrate the fabrication of a broadband saturable absorber with a silver bottom mirror. The reflectivity bandwidth of the absorber shows the potential for generating sub-10-fs pulses. With a Ti:sapphire laser we obtained self-starting Kerr-lens mode-locked pulses as short as 10 fs at the cavity stability limit and self-starting soliton mode-locked pulses of 16 fs over the full cavity stability regime.
A saturable absorber is a simple and cheap substitute for an active modulator. Triggering of a pulse then occurs when the laser gain becomes so high that lasing begins despite the presence of the absorber. Once the optical power becomes high, the absorber is saturated, i.e.,.
Pulse transmission througli a saturable absorber 141 It thus appears that the intensity required to saturate the absorption mechanism is some three orders of magnitude less for the glass than for the phthalocyanines. The curves for pulses of shorter duration shw an increasing peak-power requirement to saturate the absorption.
Intracavity semiconductor saturable absorber mirrors (SESAM’s) … 10’s of picoseconds to sub-10 fs . This paper reviews the design requirements of SESAM’s for stable pulse generation in both the mode-locked and Q-switched regime. The combination of device … Shorter pulse durations to 6 fs were achieved through addi-, RP Photonics Encyclopedia – saturable absorbers, passive mode locking …
RP Photonics Encyclopedia – semiconductor saturable …
Saturable absorption – Wikipedia, RP Photonics Encyclopedia – saturable absorbers, passive mode locking …
