Synchroscan streak camera temporal resolution improvement by phase locked loop technique

Wilfried Uhring; Chantal Virginie Zint; Patrick Summ; Bernard Cunin

doi:10.1117/12.516884

1 August 2003 Synchroscan streak camera temporal resolution improvement by phase-locked loop technique

Wilfried Uhring, Chantal Virginie Zint, Patrick Summ, Bernard Cunin

Proceedings Volume 4948, 25th International Congress on High-Speed Photography and Photonics; (2003) https://doi.org/10.1117/12.516884
Event: 25th international Congress on High-Speed photography and Photonics, 2002, Beaune, France

Abstract

Different temporal instabilities, which degrade the temporal resolution of s a synchroscan streak camera, have been studied. Each of the 3 main components: the laser, the trigger and the streak camera, have their intrinsic instability, thus a degradation of the final temporal resolution is occurred. An internal PLL in the streak camera has been developed in order to improve the temporal resolution. The synchroscan signal is used to lock the phase of the deflection voltage with the laser beam as close as possible. The phase detector has 0 to 360° area detection and a jitter lower than 300 fs FWHM integrated from 10 to 600 kHz, allowing sub picoseconds synchronization with the laser beam. The slow drifts, from 0 to 25 Hz, of the phase comparator are cancelled with a laser reference directly inserted in the camera input. By the way of an image processing, the phase command voltage is modified to lock the position of this laser reference. Results show that this stabilized camera can be used immediately after it is turned on (suppression of the warm-up time) and has very good temporal resolution, even with a long time exposure (2.4 ps FWHM with a time exposure of 2 hours has been realized). This allows more exploration in detection of very weak signals.

Citation Download Citation

Wilfried Uhring, Chantal Virginie Zint, Patrick Summ, and Bernard Cunin "Synchroscan streak camera temporal resolution improvement by phase-locked loop technique", Proc. SPIE 4948, 25th International Congress on High-Speed Photography and Photonics, (1 August 2003); https://doi.org/10.1117/12.516884

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KEYWORDS

Temporal resolution

Streak cameras

Picosecond phenomena

Cameras

Signal detection

Phase shift keying

Optical filters

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