At a Glance
Highly customizable, strain-free Semiconductor Saturable Absorber Mirrors (SESAMs) based on InP-based technology
Technical Background
Robust, high-quality semiconductor saturable absorber mirrors (SESAMs) are a prerequisite for implementing mode-locked pulsed laser systems with high performance and long-term stability. The InP-based SESAM platform at Fraunhofer HHI combines highly customizable device performance, long lifetime and excellent wafer-to-wafer reproducibility for volume production. Our SESAM designs are based on monolithic, strain-free semiconductor structures supplemented with application-specific dielectric coatings. This enables the adaption of our SESAMs to your specific laser design.
Features
- Realization of custom designs
- Robust, strain-free semiconductor stack
- Application-specific dielectric coatings
- Highly customizable performance
- Wafer-scale production
Applications
- Solid-state lasers
- Fiber lasers
- Semiconductor lasers
Specifications
- Operation wavelength: 1500 to 1600 nm
- Relaxation time TA: 200 fs to 100 ps
- Modulation depth ΔR: typ. 1 to 20%
- Non-saturable losses ΔRns: down to <1 %
- Saturation fluence Fsat: typ. 10 to 100 μJ/cm²
- Roll-over fluence F2: typ. 10 to 1000 μJ/cm²
- Stopband FWHM: typ. 100 nm
