Title

Heterodyne Technique For The Direct Measurement Of The Amplitude And Phase Of Photorefractive Space-Charge Fields

Abstract

A heterodyne technique is presented for the independent, direct measurement of the amplitude and phase of photorefractive space-charge fields during uninterrupted buildup and photoinduced decay. The technique is based on using a probe beam with a frequency slightly different from that of the two recording beams to continuously read photorefractive phase gratings during all stages of formation and decay. The probe beam is virtually collinear with one of the recording beams. The beat between the diffracted component of the frequency-shifted probe beam and the transmitted component of the recording beam produces a heterodyne beam component. This heterodyne component contains the photorefractive grating information and is monitored to yield the amplitude and phase of the photorefractive fields. This nondestructive characterization technique exhibits excellent sensitivity and permits photorefractive phase measurements to within 1.5°. © 1994 Optical Society of America.

Publication Date

1-1-1994

Publication Title

Journal of the Optical Society of America B: Optical Physics

Volume

11

Issue

3

Number of Pages

470-475

Document Type

Article

Identifier

scopus

Personal Identifier

scopus

DOI Link

https://doi.org/10.1364/JOSAB.11.000470

Socpus ID

0028404444 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0028404444

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