Contra-Directional Two-Beam Coupling by use of a Single Input Beam in an Iron-Doped Lithium Niobate Multimode Fiber
Applied Optics, Vol. 41, Issue 32, pp. 6890-6893 (2002)
http://dx.doi.org/10.1364/AO.41.006890
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Abstract
Experimental results are presented for 180° contra-directional two-beam coupling (TBC) measurements in a single crystal fiber of LiNbO3:Fe using a single incident beam and its Fresnel reflection off the back surface of the fiber. To our knowledge, this is the first time that volume gratings have been written in a fiber using this beam coupling geometry. At small f-numbers, the TBC efficiency has been predicted to decrease in bulk LiNbO3:Fe due to the erasure of the weak gratings by the dark conductivity. We present experimental results validating the published theory and show experimentally that confinement of the interfering beams in a fiber geometry overcomes this limitation.
© 2002 Optical Society of America
[Optical Society of America ]
OCIS Codes
(090.7330) Holography : Volume gratings
(190.4370) Nonlinear optics : Nonlinear optics, fibers
(190.5330) Nonlinear optics : Photorefractive optics
Citation
D. R. Evans, M. A. Saleh, T. J. Bunning, L. Lu, R. S. Meltzer, W. M. Yen, and S. Guha, "Contra-Directional Two-Beam Coupling by use of a Single Input Beam in an Iron-Doped Lithium Niobate Multimode Fiber," Appl. Opt. 41, 6890-6893 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-32-6890
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