Graphene-Based Photonics Devices for Remote Sensing

Currently, the dominant method to generate ultrafast laser pulses passively is to use semiconductor saturable absorber mirrors (SESAMs). This type of passive mode locker produces exceptional results but is difficult to fabricate, expensive, and limited in bandwidth. In contrast, a graphene-based saturable absorber is easier to produce and has the advantages of much wider bandwidth, lower saturation intensity, tunable modulation depth, ultrafast recovery time, and much higher optical damage threshold, thus producing higher energies.