SESAM (Semiconductor Saturable Absorber Mirror)

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SESAM (Semiconductor Saturable Absorber Mirror)

SESAM (semiconductor saturable absorber mirror) mode-locked ultrafast pulsed lasers represent an important breakthrough in the development of mode-locked lasers; a key challenge has been extending the technology to the mid-infrared. This design is based on an InAs/GaSb superlattice SESAM, which achieves over 99 % reflectivity and 10 - 15 % modulation depth with 1.4 ps to 720 ps relaxation-time flexibility over 2800 - 5000 nm, giving stable phase mode locking. Its ultra-wide operating bandwidth and flexible parameter design suit fluoride fibre lasers, crystal lasers and mid-infrared semiconductor lasers in the 3 - 5 µm band.

Key Features

Reflectivity over 99 %
Modulation depth 10 - 15 %
Relaxation time 1.4 ps to 720 ps, selectable
Operating range 2800 - 5000 nm
InAs/GaSb superlattice design for the mid-infrared
Higher damage threshold
Stable phase mode locking for 3 - 5 µm ultrafast fibre lasers

Specifications

Parameter	Specifications
Reflectivity	> 99 %
Modulation Depth	10 - 15 %
Relaxation Time	1.4 ps to 720 ps
Operating Wavelength Range	2800 - 5000 nm
Device Structure	InAs/GaSb Type-II superlattice
Absorptivity	38 - 40 %
Saturation Fluence	40 - 70 µJ/cm²

Standard models

Model type	SAM-2800-40-680ps-c/e	SAM-3500-38-720ps-c/e	SAM-3500-38-7ps-c/e	SAM-3500-38-1.4ps-c/e
Central Wavelength	2800 nm	3500 nm	3500 nm	3500 nm
Absorptivity	40 %	38 %	38 %	38 %
Modulation Depth	15 %	11.5 %	14 %	11.5 %
Relaxation Time	680 ps	720 ps	7 ps	1.4 ps
Saturation Fluence	70 µJ/cm²	70 µJ/cm²	50 µJ/cm²	40 µJ/cm²

Data Sheet: SESAM (PDF)

Tell us your wavelength, modulation depth and relaxation time and we will quote the right SESAM.

SESAM

SESAM (Semiconductor Saturable Absorber Mirror)

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