Integrated quasi-collinear acousto-optic mode converter with weighted coupling

Min Lv; Jianmin Cui; Wei Liu; Fang Cui; Yu Nan Sun

doi:10.1117/12.570849

Integrated quasi-collinear acousto-optic mode converter with weighted coupling

Min Lv^*, Jianmin Cui, Wei Liu, Fang Cui, Yu Nan Sun

^*Corresponding author for this work

School of Optics and Photonics

Beijing Institute of Technology

Research output: Contribution to journal › Conference article › peer-review

Abstract

In the paper, a weighted-coupling scheme of a SiO₂ film-loaded Ti:LiNbO₃ quasi-collinear integrated acousto-optic mode converter is reported, in which an angular offset between the acoustic and optical waveguides is introduced to implement an optimized Hamming weighted function for realization of ultralow sidelobe level. Acoustic wave guiding properties have been investigated for films such as SiO₂, ZnO on LiNbO₃ firstly. SiO₂ film on LiNbO₃ was selected as acoustic waveguide. With the mode analysis of the acoustic wave guide and the theory of coupling mode the limit of the width, weighted coupling coefficient and the characteristics of the conversion of acousto-optic modes are obtained. As the angle between acoustical and optical waveguides is 0.45°, the worst sidelobe level is -16.8dB and the theoretical values of bandwidths of -3dB and -10dB is 1.37nm and 2.31nm respectively, which have excelled the domestic reported level.

Original language	English
Article number	115
Pages (from-to)	591-595
Number of pages	5
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	5624
DOIs	https://doi.org/10.1117/12.570849
Publication status	Published - 2005
Event	Semiconductor and Organic Optoelectronic Materials and Devices - Beijing, China Duration: 9 Nov 2004 → 11 Nov 2004

Keywords

Integrated acousto-optic tunable filters
Quasi-collinear mode converter
SAW guide
Theory of coupling mode

Access to Document

10.1117/12.570849

Cite this

@article{7a8afaac4a35414e93587fa4c16cd129,

title = "Integrated quasi-collinear acousto-optic mode converter with weighted coupling",

abstract = "In the paper, a weighted-coupling scheme of a SiO2 film-loaded Ti:LiNbO3 quasi-collinear integrated acousto-optic mode converter is reported, in which an angular offset between the acoustic and optical waveguides is introduced to implement an optimized Hamming weighted function for realization of ultralow sidelobe level. Acoustic wave guiding properties have been investigated for films such as SiO2, ZnO on LiNbO3 firstly. SiO2 film on LiNbO3 was selected as acoustic waveguide. With the mode analysis of the acoustic wave guide and the theory of coupling mode the limit of the width, weighted coupling coefficient and the characteristics of the conversion of acousto-optic modes are obtained. As the angle between acoustical and optical waveguides is 0.45°, the worst sidelobe level is -16.8dB and the theoretical values of bandwidths of -3dB and -10dB is 1.37nm and 2.31nm respectively, which have excelled the domestic reported level.",

keywords = "Integrated acousto-optic tunable filters, Quasi-collinear mode converter, SAW guide, Theory of coupling mode",

author = "Min Lv and Jianmin Cui and Wei Liu and Fang Cui and Sun, {Yu Nan}",

year = "2005",

doi = "10.1117/12.570849",

language = "English",

volume = "5624",

pages = "591--595",

journal = "Proceedings of SPIE - The International Society for Optical Engineering",

issn = "0277-786X",

publisher = "SPIE",

note = "Semiconductor and Organic Optoelectronic Materials and Devices ; Conference date: 09-11-2004 Through 11-11-2004",

}

TY - JOUR

T1 - Integrated quasi-collinear acousto-optic mode converter with weighted coupling

AU - Lv, Min

AU - Cui, Jianmin

AU - Liu, Wei

AU - Cui, Fang

AU - Sun, Yu Nan

PY - 2005

Y1 - 2005

N2 - In the paper, a weighted-coupling scheme of a SiO2 film-loaded Ti:LiNbO3 quasi-collinear integrated acousto-optic mode converter is reported, in which an angular offset between the acoustic and optical waveguides is introduced to implement an optimized Hamming weighted function for realization of ultralow sidelobe level. Acoustic wave guiding properties have been investigated for films such as SiO2, ZnO on LiNbO3 firstly. SiO2 film on LiNbO3 was selected as acoustic waveguide. With the mode analysis of the acoustic wave guide and the theory of coupling mode the limit of the width, weighted coupling coefficient and the characteristics of the conversion of acousto-optic modes are obtained. As the angle between acoustical and optical waveguides is 0.45°, the worst sidelobe level is -16.8dB and the theoretical values of bandwidths of -3dB and -10dB is 1.37nm and 2.31nm respectively, which have excelled the domestic reported level.

AB - In the paper, a weighted-coupling scheme of a SiO2 film-loaded Ti:LiNbO3 quasi-collinear integrated acousto-optic mode converter is reported, in which an angular offset between the acoustic and optical waveguides is introduced to implement an optimized Hamming weighted function for realization of ultralow sidelobe level. Acoustic wave guiding properties have been investigated for films such as SiO2, ZnO on LiNbO3 firstly. SiO2 film on LiNbO3 was selected as acoustic waveguide. With the mode analysis of the acoustic wave guide and the theory of coupling mode the limit of the width, weighted coupling coefficient and the characteristics of the conversion of acousto-optic modes are obtained. As the angle between acoustical and optical waveguides is 0.45°, the worst sidelobe level is -16.8dB and the theoretical values of bandwidths of -3dB and -10dB is 1.37nm and 2.31nm respectively, which have excelled the domestic reported level.

KW - Integrated acousto-optic tunable filters

KW - Quasi-collinear mode converter

KW - SAW guide

KW - Theory of coupling mode

UR - http://www.scopus.com/inward/record.url?scp=17644384103&partnerID=8YFLogxK

U2 - 10.1117/12.570849

DO - 10.1117/12.570849

M3 - Conference article

AN - SCOPUS:17644384103

SN - 0277-786X

VL - 5624

SP - 591

EP - 595

JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

M1 - 115

T2 - Semiconductor and Organic Optoelectronic Materials and Devices

Y2 - 9 November 2004 through 11 November 2004

ER -

Integrated quasi-collinear acousto-optic mode converter with weighted coupling

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this