Integrated Photonics Research最新文献_第2页

Novel integrated acousto-optic and electro-optic heterodyning devices in a LiNbO3 waveguide 新型集成声光和电光外差器件在LiNbO3波导中

Integrated Photonics Research Pub Date : 1991-01-07 DOI: 10.1063/1.104427

G. Xu, C. Tsai

{"title":"Novel integrated acousto-optic and electro-optic heterodyning devices in a LiNbO3 waveguide","authors":"G. Xu, C. Tsai","doi":"10.1063/1.104427","DOIUrl":"https://doi.org/10.1063/1.104427","url":null,"abstract":"The conventional acousto-optic (AO) Bragg cell rf receiver is known to suffer from two limitations: limited dynamic range and incapability for phase measurement. To increase the dynamic range and to facilitate the phase measurement, we must use optical heterodyning detection. Most related works have been carried out using bulk AO Bragg cells1 in which a number of beam splitters, mirrors, and wedges were configured into a Mach-Zehnder interferometer to facilitate the required functions of beam splitting, directing, combination, and filtering for the signal and reference beams. To overcome the problems of vibrations and thermal fluctuations and subwavelength alignment tolerances required, a so-called modified Mach-Zehnder interferometer was explored recently. This expoloration was accomplished by using integrated-optic (IO) architecture2 in which a pair of proton-exchanged gratings were used as the beam splitting, directing, and combining elements. A relatively low dynamic range of 30 dB was measured owing to excessive optical losses from the gratings and the propagation in the waveguide. In this paper we present a simple IO architecture that utilizes wideband cascaded AO and electrooptic (EO) Bragg diffractions in Y-cut LiNbO3 planar waveguide to perform efficient and wideband heterodyning detection. The results obtained thus far suggest a new architecture for the realization of wideband IO interferometric rf spectrum analyzers.","PeriodicalId":175010,"journal":{"name":"Integrated Photonics Research","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134305479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}