TOPAS-prime CEP stability measurements for idler wave @ 1900nm have been extended to 1 hour time frame. As idler wave is passively CEP locked due to three-wave parametrical interaction only small phase drift cause by environmental conditions has to be compensated. Compensation is performed by employing an f-2f interferometer and feedback loop controlling temporal delay between seed and pump in second amplification stage of TOPAS-prime.  The standard deviation of long term CEP distribution [Fig. 3] is 120 mrad.

ORPHEUS OPA can be modified to produce passively carrier-envelope phase (CEP) stabilized tunable output in NIR range using non-CEP-stabilized pump laser. The special design of ORPHEUS with white light continuum generated using the pulses of second harmonic allow one to carry a fixed phase relationships between pump and seed. In the case of tree-wave parametric interaction the phase of newly generated idler pulse is passively stabilized even if the pump laser is non-stabilized PHAROS amplifier. Tuning range of CEP stable pulses exceeds 1300-2600 nm and can be extended by frequency doubling. Only slow drift of idler CEP is usually observed due changes in environmental conditions. Light Conversion introduces idler CEP drift compensation system based on nonlinear f-2f interferometer and feedback loop which applies a controlled temporal delay between two interacting pulses in the last amplification stage of ORPHEUS. We demonstrate <100 mrad STD phase stability over six hours.

ORPHEUS-Twins – two independently tunable optical parametric amplifiers designed for high repetition rate operation. Both OPAs are integrated into a single monolithic housing and share the same white light continuum source as seed for amplification. ORPHEUS-Twins provides two outputs, independently tunable in the 630nm – 2600nm range and pulse durations below 200 femtoseconds. The design of this OPA offers completely hands-free wavelength tuning and automatic Signal/Idler separation, also ensuring the same position and direction for all wavelengths. ORPHEUS-Twins integrates two mini spectrometers for online monitoring of output wavelength, with self-calibration and laser diagnostics function capabilities.