Pyro-electro-optic phase gratings | Zendy

Stephen Ducharme | Zendy

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Pyro-electro-optic phase gratings

Author(s) -

Stephen Ducharme

Publication year - 1991

Publication title -

optics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.524

H-Index - 272

eISSN - 1071-2763

pISSN - 0146-9592

DOI - 10.1364/ol.16.001791

Subject(s) - optics , pyroelectricity , grating , materials science , diffraction efficiency , laser , figure of merit , diffraction grating , phase (matter) , diffraction , transient (computer programming) , absorption (acoustics) , optoelectronics , physics , quantum mechanics , computer science , dielectric , ferroelectricity , operating system

A new physical mechanism is proposed for generating transient phase gratings in transparent pyroelectric materials. The mechanism combines the pyroelectric and electro-optic effects to convert spatial intensity variations into transient phase gratings. The grating diffraction efficiency increases with a figure of merit that is proportional to the pyroelectric, electro-optic, and absorption coefficients and is inversely proportional to the specific heat. The grating response time is proportional to the specific heat and inversely proportional to the thermal conductivity. Diffraction efficiencies that approach unity are predicted in several readily available electro-optic materials with modest pulse energies from Q-switched Nd:YAG lasers. Observation with cw laser sources is also proposed. The pyro-electro-optic mechanism is compared with other known mechanisms.

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