Single-Shot, High-Repetition Rate Carrier-Envelope-Phase Detection of Ultrashort Laser Pulses

We propose a single-shot, high-repetition rate measurement scheme of the Carrier-Envelope Phase offset of ultrashort laser pulses. The spectral fringes resulting from f-2f nonlinear interferometry, encoding the Carrier-Envelope-Phase, are evaluated completely optically via optical Fourier transform. For demonstration, the Carrier-Envelope-Phase of a 200 kHz, few-cycle OPCPA laser system was measured employing an interferometer as a periodic optical filter. The proposed method shows excellent agreement with simultaneous measurement of the spectral fringes by a fast line-scan camera.