Experimental studies of optical guiding in a Raman free electron laser

J. W. Dodd, S. P. Chang, S. Y. Cai, A. Bhattacharjee, T. C. Marshall

Research output: Contribution to conferencePaperpeer-review


Summary form only given, as follows. Optical guiding manifests itself in the Columbia free-electron laser (λ= 1.8-1.9 mm, j = 1-2 kA/cm2 , aw = 1/3, γ= 2.5) in three experimental tests: the observation of spatial ring-down (mode interference) after electron-beam termination, the effect on sideband location, and enhancement of the filling factor and gain. The experiment uses an overmoded 17-mm-diameter waveguide that contains the 4-mm electron beam. A 2-D code that solves the growth of radiation along the beam, incorporating the electron motion, is used to interpret the data. Measurements validating optical guiding in the Columbia Raman free electron laser are presented, emphasizing the filling-factor effect in the regime of exponential growth where refractive guiding dominates gain guiding. Additional data in operating conditions where the signal growth saturates are also presented.

Original languageEnglish (US)
Number of pages1
StatePublished - 1989
Externally publishedYes
EventQuantum Electronics and Laser Science Conference - Baltimore, MD, USA
Duration: Apr 24 1989Apr 28 1989


OtherQuantum Electronics and Laser Science Conference
CityBaltimore, MD, USA

All Science Journal Classification (ASJC) codes

  • General Engineering


Dive into the research topics of 'Experimental studies of optical guiding in a Raman free electron laser'. Together they form a unique fingerprint.

Cite this