Acousto-optic programmable dispersive filter

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An acousto-optic programmable dispersive filter (AOPDF) is a special type of collinear-beam acousto-optic modulator[1] capable of shaping spectral phase and amplitude of ultrashort laser pulses. AOPDF was invented by Pierre Tournois.[2] Typically, quartz crystals are used for the fabrication of the AOPDFs operating in the UV spectral domain, paratellurite crystals are used in the visible and the NIR (up to 4 µm) and calomel in the MIR (3-20 µm). The AOPDF is also used for the active control of the carrier-envelope phase of the few-cycle optical pulses[3] and as a part of pulse-measurement schemes.[4] Although sharing a lot in principle of operation with an acousto-optic tunable filter, the AOPDF should not be confused with it, since in the former the tunable parameter is the transfer function and in the latter it is the impulse response

Image illustrating the principle of spectral phase and amplitude shaping by an acousto-optic programmable dispersive filter.

Theory of operation[edit]

Traveling acoustic wave induces variations in optical properties thus forming a dynamic volume grating.

Pulse shaping[edit]

AOPDF is a programmable spectral filter.

See also[edit]


  1. ^ I.C. Chang (1992). "Collinear beam acousto-optic tunable filters". Electronics Letters. 28 (13): 1255–1256. doi:10.1049/el:19920793. 
  2. ^ Pierre Tournois (1997). "Acousto-optic programmable dispersive filter for adaptive compensation of group delay time dispersion in laser systems". Optics Communications. 140 (4–6): 245–249. Bibcode:1997OptCo.140..245T. doi:10.1016/S0030-4018(97)00153-3. 
  3. ^ L. Canova; et al. (2009). "Carrier-envelope phase stabilization and control using a transmission grating compressor and an AOPDF". Optics Letters. 34: 1333–5. Bibcode:2009OptL...34.1333C. doi:10.1364/OL.34.001333. 
  4. ^ Forget, Nicolas; Oksenhendler, Thomas (2010). "Pulse Measurement Techniques Using an Acousto-Optic Programmable Dispersive Filter". In Mikhail Grishin. Advances in Solid State Lasers Development and Applications. InTech. ISBN 978-953-7619-80-0.