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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 13 — May. 1, 2009
  • pp: 2515–2521

Compensation of frequency modulation to amplitude modulation conversion in frequency conversion systems

Steve Hocquet, Geoffrey Lacroix, and Denis Penninckx  »View Author Affiliations

Applied Optics, Vol. 48, Issue 13, pp. 2515-2521 (2009)

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Frequency modulation to amplitude modulation (FM-to-AM) conversion is an important issue that can prevent fusion ignition with high power lasers such as the Laser MegaJoule (LMJ). On LMJ, most of the FM-to-AM conversion is expected in the so-called frequency conversion and focusing system, which is a nonlinear system. However, we propose linear transfer functions to compensate the effect of frequency conversion on FM-to-AM conversion. We show that most of AM distortion can be reduced by practical systems: for beam intensity up to 3 GW / cm 2 , the FM-to-AM conversion level can be divided by at least 2, and we almost cancel intensity modulation for intensities below 1 GW / cm 2 .

© 2009 Optical Society of America

OCIS Codes
(060.5060) Fiber optics and optical communications : Phase modulation
(190.2620) Nonlinear optics : Harmonic generation and mixing
(070.2615) Fourier optics and signal processing : Frequency filtering
(140.3518) Lasers and laser optics : Lasers, frequency modulated

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: January 29, 2009
Revised Manuscript: April 6, 2009
Manuscript Accepted: April 13, 2009
Published: April 27, 2009

Steve Hocquet, Geoffrey Lacroix, and Denis Penninckx, "Compensation of frequency modulation to amplitude modulation conversion in frequency conversion systems," Appl. Opt. 48, 2515-2521 (2009)

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