Hybrid bistable optical device using an acoustooptic waveguide modulator

1981 ◽  
Vol 59 (9) ◽  
pp. 1251-1253 ◽  
Author(s):  
J. Albert ◽  
D. Vincent ◽  
R. Tremblay
Keyword(s):  
Optical Waveguide ◽  
Glass Substrate ◽  
Figure Of Merit ◽  
Mode Conversion ◽  
Acoustic Power ◽  
Fused Silica ◽  
Optical Device ◽  
Tm Mode ◽  
Waveguide Modulator ◽  
Bistable Optical Device

In this paper, we present a hybrid bistable optical device based on acoustooptic TE–TM mode conversion in an optical waveguide made of sputtered Ta2O5 on a glass substrate. The essential nonlinear transmission is provided by acoustic resonances. Bistability and optical limiting have been observed with less than 5 mW of acoustic power. A minimum value of 50 for the acoustooptic figure of merit (M2, relative to fused silica) of Ta2O5 is estimated from the results.

scholarly journals Operation principle of optical waveguide isolator based on TE-TM mode conversion

2012 ◽  
Vol 61 (16) ◽  
pp. 164201
Author(s):  
Zeng Wei-You ◽  
Xie Kang ◽  
Chen Wei ◽  
Mao Shu-Zhe
Keyword(s):  
Optical Waveguide ◽  
Mode Conversion ◽  
Tm Mode

Integrated bistable optical device using mach-zehnder interferometric optical waveguide

1979 ◽  
Vol 15 (10) ◽  
pp. 283 ◽  
Author(s):  
Hiromasa Ito ◽  
Yoh Ogawa ◽  
Humio Inaba
Keyword(s):  
Optical Waveguide ◽  
Optical Device ◽  
Bistable Optical Device

Optical TE–TM mode conversion in double epitaxial garnet waveguide

1981 ◽  
Vol 20 (14) ◽  
pp. 2444 ◽  
Author(s):  
Atsushi Shibukawa ◽  
Morio Kobayashi
Keyword(s):  
Mode Conversion ◽  
Tm Mode

Tunable acousto-optic TE–TM mode converter on a diffused optical waveguide

1980 ◽  
Vol 5 (3) ◽  
pp. 83 ◽  
Author(s):  
L. N. Binh ◽  
J. Livingstone ◽  
D. H. Steven
Keyword(s):  
Optical Waveguide ◽  
Mode Converter ◽  
Tm Mode

Nanostructuring of thin Au films by means of short UV laser pulses

2011 ◽  
Vol 19 (3) ◽  
Author(s):  
K. Grochowska ◽  
N. Nedyalkov ◽  
P. Atanasov ◽  
G. Śliwiński
Keyword(s):  
Size Distribution ◽  
Glass Substrate ◽  
Laser Pulses ◽  
Resonant Absorption ◽  
Peak Position ◽  
Fused Silica ◽  
Au Nanoparticle ◽  
Raman Signal ◽  
Particle Removal ◽  
Preparation Conditions

AbstractThe particle size distribution, morphology and optical properties of the Au nanoparticle (NP) structures for surface enhanced Raman signal (SERS) application are investigated in dependence on their preparation conditions. The structures are produced from relatively thin Au films (10–20 nm) sputtered on fused silica glass substrate and irradiated with several pulses (6 ns) of laser radiation at 266 nm and at fluencies in the range of 160–412 mJ/cm2. The SEM inspection reveals nearly homogeneously distributed, spherical gold particles. Their initial size distribution of the range of 20–60 nm broadens towards larger particle diameters with prolonged irradiation. This is accompanied by an increase in the uncovered surface of the glass substrate and no particle removal is observed. In the absorption profiles of the nanostructures, the broad peak centred at 546 nm is ascribed to resonant absorption of surface plasmons (SPR). The peak position, halfwidth and intensity depend on the shape, size and size distribution of the nanostructured particles in agreement with literature. From peak intensities of the Raman spectra recorded for Rhodamine 6G in the range of 300–1800 cm−1, the relative signal enhancement by factor between 20 and 603 for individual peaks is estimated. The results confirm that the obtained structures can be applied for SERS measurements and sensing.

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