Measurement of the output power in millimeter wave free electron laser using the electro optic sampling method

A. Abramovich, D. Borodin, A. Friedman, H. Marks

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this experimental work an electro optic (EO) sampling method was demonstrated as a method to measure the output power of an Electrostatic Accelerator Free Electron Laser (EA-FEL). This 1.4 MeV EA-FEL was designed to operate at the millimeter wavelengths and it utilizes a corrugated waveguide and two Talbot effect quasi-optical reflectors with internal losses of ∼30%. Millimeter wave radiation pulses of 10 μs at a frequency of about 100 GHz with peak power values of 1-2 kW were measured using conventional methods with an RF diode. Here we show the employment of an electrooptic sampling method using a ZnTe nonlinear crystal. A special quasi optical design directs the EA-FEL power towards the ZnTe nonlinear crystal, placed in the middle of a cross polarized configuration, coaxially with a polarized HeNe laser beam. The differences in the ZnTe optical axis due to the EA-FEL power affects the power levels of the HeNe laser transmission. This was measured using a polarizer and a balanced amplifier detector. We succeeded in obtaining a signal which corresponds to the theoretical calculation.

Original languageEnglish
Title of host publicationProceedings of the 36th International Free Electron Laser Conference, FEL 2014
Pages50-52
Number of pages3
ISBN (Electronic)9783954501335
StatePublished - 2014
Event36th International Free Electron Laser Conference, FEL 2014 - Basel, Switzerland
Duration: 25 Aug 201429 Aug 2014

Publication series

NameProceedings of the 36th International Free Electron Laser Conference, FEL 2014

Conference

Conference36th International Free Electron Laser Conference, FEL 2014
Country/TerritorySwitzerland
CityBasel
Period25/08/1429/08/14

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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