Acousto-optical tunable filters (AOTFs) are well used for practical applications and are most often based on the classical anisotropic non-collinear configuration in tellurium dioxide crystals. Any product sheet of such a commercially available AOTF presents two main features: the tuning range and the spectral bandwidth Δλ. The spectral transmission bandwidth1 is proportional to the ratio λ2 /(bW) where λ is the optical wavelength, b the dispersive constant and W the length of the transducer. The dispersive constant b is a rapidly decreasing function of the wavelength in the blue visible spectrum. As for examples: for a one octave tuning range starting from 400 nm to 800 nm, the spectral bandwidth is multiplied by ~10. For a tuning range in the infrared band 1250-2500 nm, the spectral bandwidth is multiplied by ~4. We present the design of a filter operating in the visible region from 450 nm to 650 nm. A double anisotropic interaction2 is considered allowing the simultaneous diffraction of the two optical modes propagating into the crystal by a single ultrasonic wave. A multi-electrode array of three identical consecutive electrodes Wi:1-3 = 3 mm is deposited on the transducer leading to a more precise control of the spectral bandwidth. The acousto-optic device has been fabricated by the AA-Opto company. With this component the spectral bandwidth is only multiplied by ~2 on from 400 nm to 650 nm.
{"title":"Multi-electrode array for spectral bandwidth control","authors":"J. Champagne, J. Kastelik, S. Dupont","doi":"10.1117/12.2541007","DOIUrl":"https://doi.org/10.1117/12.2541007","url":null,"abstract":"Acousto-optical tunable filters (AOTFs) are well used for practical applications and are most often based on the classical anisotropic non-collinear configuration in tellurium dioxide crystals. Any product sheet of such a commercially available AOTF presents two main features: the tuning range and the spectral bandwidth Δλ. The spectral transmission bandwidth1 is proportional to the ratio λ2 /(bW) where λ is the optical wavelength, b the dispersive constant and W the length of the transducer. The dispersive constant b is a rapidly decreasing function of the wavelength in the blue visible spectrum. As for examples: for a one octave tuning range starting from 400 nm to 800 nm, the spectral bandwidth is multiplied by ~10. For a tuning range in the infrared band 1250-2500 nm, the spectral bandwidth is multiplied by ~4. We present the design of a filter operating in the visible region from 450 nm to 650 nm. A double anisotropic interaction2 is considered allowing the simultaneous diffraction of the two optical modes propagating into the crystal by a single ultrasonic wave. A multi-electrode array of three identical consecutive electrodes Wi:1-3 = 3 mm is deposited on the transducer leading to a more precise control of the spectral bandwidth. The acousto-optic device has been fabricated by the AA-Opto company. With this component the spectral bandwidth is only multiplied by ~2 on from 400 nm to 650 nm.","PeriodicalId":405317,"journal":{"name":"Acousto-Optics and Applications","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114675777","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}
We examined optic, acoustic and acousto-optic properties of materials belonging to the borate family of trigonal crystals α-BaB2O4 and β-BaB2O4. Phase velocities of acoustic waves and frequency dependences of Bragg angles were calculated in the crystals. Figure of merit magnitudes were evaluated in XZ, YZ and in a few other planes of the materials. The analysis was carried out in order to find a possibility of using the materials in acousto-optic deflectors and filters operating in the visible light and also in the ultraviolet region of spectrum.
{"title":"Physical properties of α-BaB2O4 and β-BaB2O4 crystals promising for applications in acousto-optic devices","authors":"M. V. Marunin, V. Voloshinov","doi":"10.1117/12.2540409","DOIUrl":"https://doi.org/10.1117/12.2540409","url":null,"abstract":"We examined optic, acoustic and acousto-optic properties of materials belonging to the borate family of trigonal crystals α-BaB2O4 and β-BaB2O4. Phase velocities of acoustic waves and frequency dependences of Bragg angles were calculated in the crystals. Figure of merit magnitudes were evaluated in XZ, YZ and in a few other planes of the materials. The analysis was carried out in order to find a possibility of using the materials in acousto-optic deflectors and filters operating in the visible light and also in the ultraviolet region of spectrum.","PeriodicalId":405317,"journal":{"name":"Acousto-Optics and Applications","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114710939","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}
We present results of theoretical analysis of anisotropic acousto-optic interaction peculiarities in a spatially periodical acoustic field created by a phased array transducer with antiphase excitation of adjacent sections. Contrary to the homogeneous transducer, the transfer function of the acousto-optic cell with the phased array transducer contains two main maxima situated on the opposite sides in regard to the Bragg angle. The calculations have shown that the diffraction efficiency can reach 100% in spite of noticeable acousto-optic phase mismatch. A number of unusual features of light scattering in the spatially periodical acoustic field is revealed, which can be useful at the development of acousto-optic devices of a new type.
{"title":"Anisotropic light diffraction in spatially periodical acoustic field","authors":"V. Balakshy, M. Kupreychik, S. Mantsevich","doi":"10.1117/12.2540738","DOIUrl":"https://doi.org/10.1117/12.2540738","url":null,"abstract":"We present results of theoretical analysis of anisotropic acousto-optic interaction peculiarities in a spatially periodical acoustic field created by a phased array transducer with antiphase excitation of adjacent sections. Contrary to the homogeneous transducer, the transfer function of the acousto-optic cell with the phased array transducer contains two main maxima situated on the opposite sides in regard to the Bragg angle. The calculations have shown that the diffraction efficiency can reach 100% in spite of noticeable acousto-optic phase mismatch. A number of unusual features of light scattering in the spatially periodical acoustic field is revealed, which can be useful at the development of acousto-optic devices of a new type.","PeriodicalId":405317,"journal":{"name":"Acousto-Optics and Applications","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122070514","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}
D. Khokhlov, A. Machikhin, V. Batshev, A. Gorevoy, V. Pozhar
Endoscopic imaging systems are widely used for non-invasive diagnostics of inner tissues for biomedical applications as well as for non-destructive testing of various hard-to-reach industrial objects. Conventional white light endoscopy often does not provide contrast visualization of the inspected objects and quantitative characterization of their differences. In these cases, spectral imaging techniques may be helpful to increase the effectiveness of endoscopic inspection. Acoustooptic (AO) filtration of light is a very promising technique for implementing spectral imaging capabilities. In this paper, we discuss the peculiarities and benefits of conjugating AO tunable filters (AOTF) with rigid borescopes, flexible fiberscopes and video endoscopes. We analyze and compare imaging and spectroscopy capabilities of two alternative technical implementations: AOTF-based tunable light sources and AOTF-based add-on imaging modules. The results of this analysis are confirmed by multiple experiments.
{"title":"Endoscopic spectral imagers based on acousto-optic filtration of light","authors":"D. Khokhlov, A. Machikhin, V. Batshev, A. Gorevoy, V. Pozhar","doi":"10.1117/12.2540980","DOIUrl":"https://doi.org/10.1117/12.2540980","url":null,"abstract":"Endoscopic imaging systems are widely used for non-invasive diagnostics of inner tissues for biomedical applications as well as for non-destructive testing of various hard-to-reach industrial objects. Conventional white light endoscopy often does not provide contrast visualization of the inspected objects and quantitative characterization of their differences. In these cases, spectral imaging techniques may be helpful to increase the effectiveness of endoscopic inspection. Acoustooptic (AO) filtration of light is a very promising technique for implementing spectral imaging capabilities. In this paper, we discuss the peculiarities and benefits of conjugating AO tunable filters (AOTF) with rigid borescopes, flexible fiberscopes and video endoscopes. We analyze and compare imaging and spectroscopy capabilities of two alternative technical implementations: AOTF-based tunable light sources and AOTF-based add-on imaging modules. The results of this analysis are confirmed by multiple experiments.","PeriodicalId":405317,"journal":{"name":"Acousto-Optics and Applications","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114854187","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}
This paper describes the development, manufacturing and testing of acoustooptic (AO) modulator made of bismuth sodium molybdate NaBi(MoO4)2 crystal. Despite the rather long interest in NaBi(MoO4)2 crystals as possible AO material, there is no information about their practical use in acousto-optics. The isotropic orthogonal interaction geometry was used, a longitudinal piezoplate was used as a piezoelectric transducer, the acoustic wave was directed along the crystallographic axis Z. The modulator has shown a high diffraction efficiency (up to 87%) with an RF power of 2.5 W. NaBi(MoO4)2 is characterized by manufacturability during crystal growing and during mechanical processing and optical homogeneity
{"title":"Acousto-optical modulator based on NaBi(MoO4)2 crystal","authors":"A. Chizhikov, K. Yushkov, V. Molchanov","doi":"10.1117/12.2541046","DOIUrl":"https://doi.org/10.1117/12.2541046","url":null,"abstract":"This paper describes the development, manufacturing and testing of acoustooptic (AO) modulator made of bismuth sodium molybdate NaBi(MoO4)2 crystal. Despite the rather long interest in NaBi(MoO4)2 crystals as possible AO material, there is no information about their practical use in acousto-optics. The isotropic orthogonal interaction geometry was used, a longitudinal piezoplate was used as a piezoelectric transducer, the acoustic wave was directed along the crystallographic axis Z. The modulator has shown a high diffraction efficiency (up to 87%) with an RF power of 2.5 W. NaBi(MoO4)2 is characterized by manufacturability during crystal growing and during mechanical processing and optical homogeneity","PeriodicalId":405317,"journal":{"name":"Acousto-Optics and Applications","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127126995","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}
The accurate theory describing interaction of two coherent light beams with ultrasonic wave where one of the light beam is incident at positive Bragg angle while the other at negative was developed by Leroy and Blomme in 1984 . The assumed geometry in this theory resembles an interferometer wherein ultrasonic beam plays a role of the output beam splitter of the light. The output light intensity is modulated with ultrasonic frequency as a result of interference between the light in diffraction orders in which the frequency is changed due to the Doppler effects with those diffracted with unchanged frequency. Temporal modulation of the light intensities in diffraction orders, that was foreseen by Leroy and Blomme, was confirmed experimentally and the results will be presented. In addition, the Leroy-Blomme theory has been extended to include the effect of the initial phase of the ultrasonic wave on the phase of modulation of light intensity in diffraction orders. According to the best knowledge of the author, Leroy and Blomme theory has not been verified experimentally, although many years have passed. This theory could be applied to the quantum optics phenomenon when pairs of entangled photons are incident on ultrasonic wave instead of two coherent light beams. The geometry of interaction of two coherent light beams with ultrasonic wave in Leroy-Blomme theory is the same as for Hong-Ou-Mandel interferometer wherein a beam splitter is replaced by the ultrasonic wave. Similarities and differences between Leroy-Blomme and Hong-Ou-Mandel interferometers will be presented.
{"title":"Interaction of two coherent light beams with ultrasonic wave","authors":"P. Kwiek","doi":"10.1117/12.2540123","DOIUrl":"https://doi.org/10.1117/12.2540123","url":null,"abstract":"The accurate theory describing interaction of two coherent light beams with ultrasonic wave where one of the light beam is incident at positive Bragg angle while the other at negative was developed by Leroy and Blomme in 1984 . The assumed geometry in this theory resembles an interferometer wherein ultrasonic beam plays a role of the output beam splitter of the light. The output light intensity is modulated with ultrasonic frequency as a result of interference between the light in diffraction orders in which the frequency is changed due to the Doppler effects with those diffracted with unchanged frequency. Temporal modulation of the light intensities in diffraction orders, that was foreseen by Leroy and Blomme, was confirmed experimentally and the results will be presented. In addition, the Leroy-Blomme theory has been extended to include the effect of the initial phase of the ultrasonic wave on the phase of modulation of light intensity in diffraction orders. According to the best knowledge of the author, Leroy and Blomme theory has not been verified experimentally, although many years have passed. This theory could be applied to the quantum optics phenomenon when pairs of entangled photons are incident on ultrasonic wave instead of two coherent light beams. The geometry of interaction of two coherent light beams with ultrasonic wave in Leroy-Blomme theory is the same as for Hong-Ou-Mandel interferometer wherein a beam splitter is replaced by the ultrasonic wave. Similarities and differences between Leroy-Blomme and Hong-Ou-Mandel interferometers will be presented.","PeriodicalId":405317,"journal":{"name":"Acousto-Optics and Applications","volume":"216 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128808345","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}
This work is devoted to generalization of experimental researches results of acousto-optic filters instrumental functions at frequency modulation of an ultrasonic wave.
本文对声光滤光器在超声波调频中的仪器功能的实验研究结果进行了推广。
{"title":"Adaptive change of AOTF instrumental function with frequency modulation of ultrasonic wave","authors":"M. Mazur, L. I. Mazur, Y. Suddenok, V. N. Shorin","doi":"10.1117/12.2540108","DOIUrl":"https://doi.org/10.1117/12.2540108","url":null,"abstract":"This work is devoted to generalization of experimental researches results of acousto-optic filters instrumental functions at frequency modulation of an ultrasonic wave.","PeriodicalId":405317,"journal":{"name":"Acousto-Optics and Applications","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129276963","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}
Haonan Han, Yujia Li, Ligang Huang, L. Gao, Wei Huang, Min Liu, T. Zhu
A dual-wavelength narrowband all-fiber acousto-optic tunable bandpass filter (DNAOTBF) was proposed and fabricated via the different vector modes coupling based on the same scalar mode induced by the flexural acoustic wave in dispersion compensation fiber (DCF). In the experiment, the resonant dual-wavelength and coupling efficiency could be electrically tuned simultaneously with a range from 1526nm of 1565nm and the lowest 3-dB bandwidth was 0.92nm.
{"title":"All-fiber dual-wavelength narrowband acousto-optic tunable bandpass filter based on vector mode coupling","authors":"Haonan Han, Yujia Li, Ligang Huang, L. Gao, Wei Huang, Min Liu, T. Zhu","doi":"10.1117/12.2539812","DOIUrl":"https://doi.org/10.1117/12.2539812","url":null,"abstract":"A dual-wavelength narrowband all-fiber acousto-optic tunable bandpass filter (DNAOTBF) was proposed and fabricated via the different vector modes coupling based on the same scalar mode induced by the flexural acoustic wave in dispersion compensation fiber (DCF). In the experiment, the resonant dual-wavelength and coupling efficiency could be electrically tuned simultaneously with a range from 1526nm of 1565nm and the lowest 3-dB bandwidth was 0.92nm.","PeriodicalId":405317,"journal":{"name":"Acousto-Optics and Applications","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127126460","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}
Some personal recollections on the acousto-optics as an interesting field of physics and its applications will be shared with the participants in a short welcome address. The consecutive number of the present Spring School on AO and A, 14-th, indicates a long history of events (39 years) initiated in 1980 by the University of Gdańsk as the triennial international meeting of specialists of science and technology over the world, being continued till now.The fundamentals of the acousto-optics domain covering light (fotons) and ultrasonics (fonons) interactions originally come from works of L. N. Brillouin whose anniversaries the 130 years of his birthday and the 50 years of his death are being celebrated during the current year. The next principles were widely developed by many others in 1930’s after essential two independent papers by P. Debye and F. W. Sears (USA) and R. Lucas and P. Biquard (France), then fundamentals by C.V. Raman and N. S. Nagendra Nath, followed by many papers and applications after the II World War. The wide and rich literature of the subject of the last 100 years built up a branch of knowledge to which a piece of contribution of the AO and A Schools has its own place. The further development of the branch is prospective, too. Recently, such problems as very short time (pico- and femtoseconds) acousto-optic interactions, nonlinear processes in bio- and nano-structures and their applications in acousto-optic and optoelectronic instrumentation as well as many others are subjects of the current interest and promising topics for the future.
在简短的欢迎致辞中，我们将与与会者分享一些关于声光学作为一个有趣的物理领域及其应用的个人回忆。从1980年Gdańsk大学发起的三年一度的世界科技专家国际会议至今，至今已有39年的历史，本届春季会议在AO和A(14日)连续举行。包括光(光子)和超声(光子)相互作用的声光领域的基本原理最初来自L. N.布里渊的作品，他的诞辰130周年和逝世50周年纪念日正在今年庆祝。接下来的原理在20世纪30年代由P. Debye和F. W. Sears(美国)以及R. Lucas和P. Biquard(法国)发表的两篇重要的独立论文之后被许多其他人广泛发展，然后是C.V. Raman和N. S. Nagendra Nath的基本原理，随后是第二次世界大战后的许多论文和应用。在过去的100年里，这一主题的广泛而丰富的文献建立了一个知识分支，AO和a学派的贡献在其中占有一席之地。该分支的进一步发展也是有前景的。近年来，诸如极短时间(皮秒和飞秒)声光相互作用、生物和纳米结构中的非线性过程及其在声光和光电子仪器中的应用等问题是当前和未来的热门话题。
{"title":"Acousto-optics as a field of current interest in research and application","authors":"A. Śliwiński","doi":"10.1117/12.2540773","DOIUrl":"https://doi.org/10.1117/12.2540773","url":null,"abstract":"Some personal recollections on the acousto-optics as an interesting field of physics and its applications will be shared with the participants in a short welcome address. The consecutive number of the present Spring School on AO and A, 14-th, indicates a long history of events (39 years) initiated in 1980 by the University of Gdańsk as the triennial international meeting of specialists of science and technology over the world, being continued till now.The fundamentals of the acousto-optics domain covering light (fotons) and ultrasonics (fonons) interactions originally come from works of L. N. Brillouin whose anniversaries the 130 years of his birthday and the 50 years of his death are being celebrated during the current year. The next principles were widely developed by many others in 1930’s after essential two independent papers by P. Debye and F. W. Sears (USA) and R. Lucas and P. Biquard (France), then fundamentals by C.V. Raman and N. S. Nagendra Nath, followed by many papers and applications after the II World War. The wide and rich literature of the subject of the last 100 years built up a branch of knowledge to which a piece of contribution of the AO and A Schools has its own place. The further development of the branch is prospective, too. Recently, such problems as very short time (pico- and femtoseconds) acousto-optic interactions, nonlinear processes in bio- and nano-structures and their applications in acousto-optic and optoelectronic instrumentation as well as many others are subjects of the current interest and promising topics for the future.","PeriodicalId":405317,"journal":{"name":"Acousto-Optics and Applications","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123188368","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}
We present results of theoretical investigation of anisotropic close to collinear acousto-optic interaction in alpha-iodic acid crystal. A comparative analysis of the characteristics of quasi-collinear filters and filters based on close to collinear variant of interaction is carried out. The calculations have shown that filters based on close to collinear variant of interaction are almost as good as quasi-collinear filters in spectral resolution at the same interaction length. It is established that the effect of angular shift of geometry due to the dispersion of directions of biaxial crystal optical axes on the interaction characteristics, in this case, is much less distinct than for the wide-aperture filter in the region of small Bragg angles. This fact opens up possibilities of practical implementation of such devices without geometry of acoustooptic interaction correction.
{"title":"Investigation of close to collinear anisotropic acousto-optic interaction in a biaxial crystal of alpha-iodic acid","authors":"M. Kupreychik, V. Balakshy","doi":"10.1117/12.2541041","DOIUrl":"https://doi.org/10.1117/12.2541041","url":null,"abstract":"We present results of theoretical investigation of anisotropic close to collinear acousto-optic interaction in alpha-iodic acid crystal. A comparative analysis of the characteristics of quasi-collinear filters and filters based on close to collinear variant of interaction is carried out. The calculations have shown that filters based on close to collinear variant of interaction are almost as good as quasi-collinear filters in spectral resolution at the same interaction length. It is established that the effect of angular shift of geometry due to the dispersion of directions of biaxial crystal optical axes on the interaction characteristics, in this case, is much less distinct than for the wide-aperture filter in the region of small Bragg angles. This fact opens up possibilities of practical implementation of such devices without geometry of acoustooptic interaction correction.","PeriodicalId":405317,"journal":{"name":"Acousto-Optics and Applications","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127525243","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}
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