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An analysis is given of the optimisation of the mode conversion of guided optical waves resulting from interaction with collinearly travelling surface acoustic waves of Rayleigh type. The effects of electrooptic and acoustooptic index fluctuations together with the phase matching condition and interaction lenghts are considered. Design criteria and numerical results are given. A number of acoustooptic mode converters are then demonstrated experimentally. A 50% conversion efficiency is obtained for TE1–TM1 conversion in LiNbO3 with acoustic input power of 10 mW. Angular dispersion of laser light has been found to reduce the effective interaction length and this is demonstrated and discussed.
References
-
-
1)
-
A. Yariv
.
Coupled mode theory for guided wave optics.
J. Quant. Electronics
,
919 -
993
-
2)
-
L. Kuhn ,
P.F. Heidrich ,
E.G. Lean
.
Optical guided wave mode conversion by an acoustic surface wave.
App. Phys. Lett.
,
428 -
430
-
3)
-
R. Ulrich
.
Theory of prism-flim coupler by plane wave analysis.
J. Opt. Soc. Am.
,
10
-
4)
-
W.R. Smith ,
H.M. Gerard ,
J.H. Colling ,
T.M. Reeder ,
H.J. Shaw
.
Design of surface wave delay lines with inter-digital transducers.
IEEE Trans.
,
965 -
973
-
5)
-
T.R. Ranganath ,
S. Wang
.
Suppression of Li2 O out-diffusion form Ti-diffused LiNbO3 optical waveguides.
App. Phys Lett.
,
8 ,
376 -
378
-
6)
-
BINH, L.N., and LIVINGSTONE, J.: Codirectional and contradirectional interactions between guided optical waves and surface acoustie waves for TE-TM coupling (in prepatation).
-
7)
-
R.V. Schmidt
.
Acoustic interactions between guided optical waves and surface acoustic waves.
IEEE Trans.
,
22 -
32
-
8)
-
R.V. Schmidt ,
I.P. Kaminov
.
Metal diffused optical waveguide in LiNbO3.
App. Phys. Lett.
,
8 ,
458 -
459
-
9)
-
H. Naitoh ,
M. Nunoshita ,
T. Hakayama
.
Mode control of Ti-diffused LiNbO3 slab waveguide.
App. Opt.
,
9 ,
2546 -
2549
-
10)
-
E.M. Conwell
.
Modes in anisotropic optical waveguides formed by diffusion.
IEEE Trans.
-
11)
-
, Handbook of lasers with selected data of optical technology.
-
12)
-
Planar Products Ltd., Sunbury-on-Thames, England.
-
13)
-
K. Yamanouchi ,
K. Higuchi ,
K. Shibayama
.
TE-TM mode conversion by interaction between eleastic surface waves and a laser beam on a metal-diffused optical waveguide.
App. Phys. Lett.
,
2 ,
75 -
76
-
14)
-
G.B. Hocker ,
W.K. Burns
.
Modes in diffused optical waveguides of arbitarary index profile.
IEEE J. Quantum Electronics
,
5 ,
270 -
276
-
15)
-
Y. Omachi ,
J. Noda
.
LiNbO3 TE-TM mode conversion using collinear acoustooptic interaction.
IEEE J. Quant. Electronics
,
43 -
46
-
16)
-
H. Naito ,
M. Nanoshita ,
T. Nakayama
.
Mode control of Ti-diffused LiNbO3 slab optical waveguide.
App. Opt.
,
9 ,
2546 -
2549
-
17)
-
T.G. Giallorenzi ,
A.F. Milton
.
Light deflection in multimode waveguides using the acoustooptic interaction.
J. App. Phys.
,
1762 -
1774
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