TY - JOUR
T1 - Design of a 30 GHz bragg reflector for a Raman FEL
AU - Zambon, P.
AU - van der Slot, P.J.M.
N1 - Conference code: 15
PY - 1994
Y1 - 1994
N2 - A design of a Bragg reflector for a Raman FEL is described. It is shown that mode conversion occurs whenever the axial wavenumbers of the two modes fulfil the Bragg condition. With a constant ripple of the corrugation it is shown that the reflected radiation also contains higher order modes, assuming that the incident radiation consists only of a TE11 mode. The mode purity can be increased by increasing the length of the reflector at the expense of a smaller reflection bandwidth. A more flexible method is by applying a Hamming window to the corrugation of the reflector. Contributions of other modes to the reflected radiation can in that case be neglected. The reflector will be installed in a Raman laser to be able to compare the amplifier with the oscillator configuration. Therefore some preliminary results are also presented about the start-up of the Raman laser.
AB - A design of a Bragg reflector for a Raman FEL is described. It is shown that mode conversion occurs whenever the axial wavenumbers of the two modes fulfil the Bragg condition. With a constant ripple of the corrugation it is shown that the reflected radiation also contains higher order modes, assuming that the incident radiation consists only of a TE11 mode. The mode purity can be increased by increasing the length of the reflector at the expense of a smaller reflection bandwidth. A more flexible method is by applying a Hamming window to the corrugation of the reflector. Contributions of other modes to the reflected radiation can in that case be neglected. The reflector will be installed in a Raman laser to be able to compare the amplifier with the oscillator configuration. Therefore some preliminary results are also presented about the start-up of the Raman laser.
U2 - 10.1016/0168-9002(94)90411-1
DO - 10.1016/0168-9002(94)90411-1
M3 - Article
VL - 341
SP - 484
EP - 488
JO - Nuclear instruments & methods in physics research. Section A : Accelerators, spectrometers, detectors and associated equipment
JF - Nuclear instruments & methods in physics research. Section A : Accelerators, spectrometers, detectors and associated equipment
SN - 0168-9002
IS - 1-3
T2 - 15th International Free Electron Laser Conference, FEL 1993
Y2 - 23 August 1993 through 27 August 1993
ER -