Second, there's the semiconductor mirror used in the laser – called a Semiconductor Saturable Absorber Mirror or SESAM. It helps shape the laser light into short, intense pulses. This was upgraded by ...

Shaanxi Joint Laboratory of Graphene, State Key Laboratory of Photon-Technology in Western China Energy, International Collaborative Center on Photoelectric Technology and Nano Functional Materials, ...

which was invented by Keller already thirty years ago and goes by the memorable abbreviation SESAM (Semiconductor Saturable Absorber Mirror). Unlike normal mirrors, the reflectivity of a SESAM ...