Journal
LASER PHYSICS LETTERS
Volume 3, Issue 1, Pages 37-42Publisher
IOP PUBLISHING LTD
DOI: 10.1002/lapl.200510053
Keywords
ultrafast processes; optical pulse generation and pulse compression; laser oscillators and amplifiers; higher-order harmonic generation
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We demonstrate a novel scheme for carrier-envelope (CE) phase stabilization of few-cycle laser pulses from a mode-locked oscillator. Our scheme utilizes a monolithic, collinear geometry which obviates the need for splitting the laser output, where a fraction is used for CE-phase locking, in our scheme self-phase modulation and difference-frequency generation occur simultaneously in a single periodically poled lithium niobate (PPLN) crystal and are used to generate equivalent signals. Direct phase-locking and recompression of the output is enabled because the PPLN crystal transmits the majority of the incident fundamental relatively un-affected. As a result, the output provides few-cycle pulses with an unprecedented degree of short- and long-term reproducibility of the electric field waveform. These unique features, along with the simplicity of the scheme make it perfectly suitable for use in seeding CE-phase stabilized amplified laser systems. Results from 3 kHz amplified Ti:sapphire system will be presented that validate out assertions.
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