Holographic 4x4 star-coupler in silver-halide sensitized gelatin

Eli S. Simova; Mohsen Kavehrad

doi:10.1117/12.143956

1 September 1993 Holographic 4x4 star-coupler in silver-halide sensitized gelatin

Eli S. Simova, Mohsen Kavehrad

Author Affiliations +

Optical Engineering, Vol. 32, Issue 9, (September 1993). https://doi.org/10.1117/12.143956

Abstract

Star couplers are fanin-fanout devices with each input beam split into several output beams with arbitrary intensities traveling at different angles. We demonstrate a 4 x 4 holographic star coupler fabricated as multiplexed holographic gratings in silver-halide sensitized gelatin (SHSG) derived from Agfa-Gevaert plates. The processing formula is modified to achieve high diffraction efficiency and an acceptable modulation transfer function within the region of spatial frequencies of interest. The holographic characteristics of the processed SHSG are measured. The required gratings are recorded simultaneously to avoid reciprocity law failure, which occurs in SHSG as well. The gratings are recorded to ensure equal grating strength, which gives an acceptable intensity ratio between the output beams. The star coupler is examined for use as a broadcast medium in fiber-based local area networks (LAN5), where relatively high loss and inhomogeneity between the outputs could be tolerated.

Citation Download Citation

Eli S. Simova and Mohsen Kavehrad "Holographic 4x4 star-coupler in silver-halide sensitized gelatin," Optical Engineering 32(9), (1 September 1993). https://doi.org/10.1117/12.143956

Published: 1 September 1993

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