Precise measurement of the amplitude of photorefractive index gratings

Ching-Cherng Sun; Chung-Chen Tu; M. C. Chen; Peing T. Chung; Shoang C. Donn

doi:10.1117/12.363946

20 September 1999 Precise measurement of the amplitude of photorefractive index gratings

Ching-Cherng Sun, Chung-Chen Tu, M. C. Chen, Peing T. Chung, Shoang C. Donn

Proceedings Volume 3801, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications V; (1999) https://doi.org/10.1117/12.363946
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

Several photorefractive crystals such as LiNbO₃ or BaTiO₃ can be used for optical information storage as well as key elements for optical signal processing due to their unique property, viz., their refractive index varies according to their incident light distribution. Thus, we can construct phase gratings inside the crystals by using interference of two light beams. The index grating amplitude (Delta) n can be computed from the equation derived from the Band Transport model for the photorefractive effect. Experimentally, the value of (Delta) n can be estimated from counting the number of peaks in the curve for the diffraction efficiency as a function of time under the phase matching condition. Its precision is about 13%. Here we report a new method improving the measurement precision to about 1% by adding the measurement for the diffraction efficiency as a function of angle mismatch. This precise measurement of (Delta) n allows us to quantify photorefractive effect with greater precision.

Citation Download Citation

Ching-Cherng Sun, Chung-Chen Tu, M. C. Chen, Peing T. Chung, and Shoang C. Donn "Precise measurement of the amplitude of photorefractive index gratings", Proc. SPIE 3801, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications V, (20 September 1999); https://doi.org/10.1117/12.363946

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available