Abstract:
A self-seeding high power laser includes a spatial filter; an optical relay for circulating a low power un-distorted optical beam, an adaptive optic optically coupled to the output of the optical relay; a high power amplifier optically coupled to an output of the adaptive optic phase control element, wherein adaptively modified phasefront injected by the adaptive optic cancels distortions produced by the high power amplifier; a beamsplitter optically coupled to the high power amplifier for splitting the high power un-distorted optical beam into a high power output beam as the output of the self-seeding high power laser, and a low power beam; a focusing lens; a detector for detecting a metric of the low power beam; and a controller for adaptively controlling the adaptive optic to maximize the power of the high power amplifier, based on the detected metric.
Abstract:
A system for generating an optical signal having a preselected waveform includes: a laser source; a first waveform generator configured to apply a first signal to the laser source to create a laser output; an intensity modulator configured to receive the laser output; a second waveform generator configured to apply a second signal to the intensity modulator, the intensity modulator being configured to generate a pre-distorted laser signal based on the second signal and the laser output.
Abstract:
A planar waveguide (PWG) having a first end for coupling to a light pump and a second end opposite to the first end and including: a first cladding layer; a uniformly doped core layer having the first cladding layer on one side, wherein the core layer is tapered having a smaller thickness at the first end and a larger thickness at the second end; and a second cladding layer thinner than the first cladding layer, coated on another side of the core layer opposite to said one side of the core layer. The first cladding layer may also be tapered along the length of the PWG having a larger thickness at the first end and a smaller thickness at the second end with a taper angle substantially opposite that of the core layer to form the PWG with a substantially uniform overall thickness along the length.