Abstract: A laser diagnostic device may include a beamsplitter to split one or more input pulses into one or more fundamental pulses and one or more perturbing pulses, one or more beam-combining optics to combine the fundamental and perturbing pulses at a detection plane, a detector including a solid-state material at the detection plane, and a controller. The controller may receive a detector signal from the detector is indicative of nonlinear absorption in the solid-state medium of the fundamental pulses that is perturbed by the perturbing pulses. The controller may further extract a temporal electric field waveform of the one or more input pulses from the detector signal and provide as an output at least one of the temporal electric field waveform, a spectrum, or a spectral phase of the one or more input pulses.

Abstract: A feedback control module for stabilizing a carrier-envelope phase of an output of a laser oscillator system comprises a first photodetector, a second photodetector, a phase stabilizer, an optical modulator, and a thermal control element. The first photodetector may generate a first feedback signal corresponding to a first portion of a laser beam from an oscillator. The second photodetector may generate a second feedback signal corresponding to a second portion of the laser beam filtered by a low-pass filter. The phase stabilizer may divide the frequency of the first feedback signal by a factor and generate an error signal corresponding to the difference between the frequency-divided first feedback signal and the second feedback signal. The optical modulator may modulate the laser beam within the oscillator corresponding to the error signal. The thermal control unit may change the temperature of the oscillator corresponding to a signal operable to control the optical modulator.

Abstract: A feedback control module for stabilizing a carrier-envelope phase of an output of a laser oscillator system comprises a first photodetector, a second photodetector, a phase stabilizer, an optical modulator, and a thermal control element. The first photodetector may generate a first feedback signal corresponding to a first portion of a laser beam from an oscillator. The second photodetector may generate a second feedback signal corresponding to a second portion of the laser beam filtered by a low-pass filter. The phase stabilizer may divide the frequency of the first feedback signal by a factor and generate an error signal corresponding to the difference between the frequency-divided first feedback signal and the second feedback signal. The optical modulator may modulate the laser beam within the oscillator corresponding to the error signal. The thermal control unit may change the temperature of the oscillator corresponding to a signal operable to control the optical modulator.