MID-Infrared Sesam for Precision Pulse Modulation

1 / 5

MID-Infrared Sesam for Precision Pulse Modulation

Customization:	Available
After-sales Service:	Shelf Life One Year (Under Normal Use Conditions)
Warranty:	Shelf Life One Year (Under Normal Use Conditions)

Send Inquiry

Product Description

Basic Specifications

Model NO.:

SESAM

Certification:

ISO9001

Customized:

Available

Absorption Rate:

40%; 38%

Modulation Depth:

15%; 11.5%

Relaxation Time:

680PS; 720PS; 7PS; 1.4PS

Wavelength:

Central: 2800nm; 3500nm

Origin:

China

Product Overview

SESAM (Semiconductor Saturable Absorber Mirror) mode-locked ultrafast pulsed lasers represent an important breakthrough in the development of mode-locked lasers. A key challenge addressed by this technology is extending SESAM capabilities into the mid-infrared (MIR) region.

We propose a design based on InAs/GaSb superlattice SESAM, which achieves over 99% reflectivity, 10%~15% modulation depth, and 1.4ps-720ps flexibility in the wavelength range of 2800nm-5000nm.

This innovation marks the first time worldwide that 3-5μm ultrafast fiber laser realization has been achieved. Its ultra-wide operating bandwidth and flexible parameter design meet requirements for various laser types, including fluoride fiber lasers, crystal lasers, and 3-5μm spectral range semiconductor lasers.

Core Advantages & Structure

Applications:

Key mode-locking component for DPSS passive mode-locked lasers
Ultrafast fiber laser systems (3-5μm)
Mid-infrared coherent source development

Structure Benefits:

Class-II Superlattice with wide bandwidth (2~5μm)
No Lattice Mismatching
10× LIDT than conventional models
Superfast Relaxation Time (<1.4ps)

Technical Specifications

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

Frequently Asked Questions

Q1: What is the primary wavelength range for these SESAM components? A: These components are specifically designed for the mid-infrared (MIR) region, covering a wide range from 2800nm up to 5000nm.

Q2: What makes the InAs/GaSb superlattice design superior? A: This design eliminates lattice mismatching and provides a Laser Induced Damage Threshold (LIDT) that is 10 times higher than conventional SESAM models.

Q3: Are there different relaxation time options available? A: Yes, we offer highly flexible relaxation times ranging from ultra-fast 1.4ps up to 720ps to suit various mode-locking requirements.

Q4: Can these SESAMs be used with fiber lasers? A: Absolutely. They are ideal for fluoride fiber lasers, as well as crystal lasers and mid-infrared semiconductor lasers.

Q5: What is the typical modulation depth for these devices? A: Depending on the specific model, the modulation depth typically ranges between 11.5% and 15%.

Q6: Is customization available for specific laser parameters? A: Yes, the design allows for flexible parameter adjustments to meet the specialized requirements of different laser systems in the 3-5μm band.