Proposal on a single-shot correlator for measuring contrast ratio based on optical replication

Suochao Yuan; Limin Gao; Juanning Zhao

doi:10.1117/12.2006555

16 May 2013 Proposal on a single-shot correlator for measuring contrast ratio based on optical replication

Suochao Yuan, Limin Gao, Juanning Zhao

Proceedings Volume 8796, 2nd International Symposium on Laser Interaction with Matter (LIMIS 2012); 879629 (2013) https://doi.org/10.1117/12.2006555
Event: 2nd International Symposium on Laser Interaction with Matter (LIMIS 2012), 2012, Xi'an, Shaanxi, China

Abstract

We propose a new idea to measure the temporal contrast of laser pulses in this paper. Unlike the traditional time-to-space transformation method, the design in this paper can be called a somewhat time-to-time transformation. A single-shot pulse beam is simultaneously divided into two separate beams by a beam splitter. The two beams then enter a pair of optical replicators respectively to generate two pulse sequences that have equal time intervals respectively. The time interval of the two sequences alters by about 100fs that we can use one sequence to scan the other at a time resolution of 100fs through a nonlinear crystal. The time resolution depends on the altering of time interval and the time window depends on the pulse number of the sequence. This method can avoid the spatial modulation of the laser pulse. On the other side, the time resolution and time window are adjustable. It is also possible to measure the high contrast with a low-dynamic- range detector by attenuating the power of each pulse in the sequence respectively.

Citation Download Citation

Suochao Yuan, Limin Gao, and Juanning Zhao "Proposal on a single-shot correlator for measuring contrast ratio based on optical replication", Proc. SPIE 8796, 2nd International Symposium on Laser Interaction with Matter (LIMIS 2012), 879629 (16 May 2013); https://doi.org/10.1117/12.2006555

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KEYWORDS

Signal detection

Fabry–Perot interferometers

Beam splitters

Sensors

Modulation

Signal attenuation

Nonlinear crystals

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