Pub Date : 2021-09-26DOI: 10.23919/MOC52031.2021.9598039
Mikiya Fujimori, Shinya Takemae, Yosuke Tanaka
We investigated sensitivity improvement of a dynamic displacement measurement system composed of a phase-modulated fiber optic interferometer and a spatial optical system. The newly developed system measured the dynamic displacement including high-frequency vibration even when the reflected power from a sample was -50 dBm.
{"title":"Sensitivity improvement of dynamic displacement measurement system composed of phase-modulated fiber optic interferometer","authors":"Mikiya Fujimori, Shinya Takemae, Yosuke Tanaka","doi":"10.23919/MOC52031.2021.9598039","DOIUrl":"https://doi.org/10.23919/MOC52031.2021.9598039","url":null,"abstract":"We investigated sensitivity improvement of a dynamic displacement measurement system composed of a phase-modulated fiber optic interferometer and a spatial optical system. The newly developed system measured the dynamic displacement including high-frequency vibration even when the reflected power from a sample was -50 dBm.","PeriodicalId":355935,"journal":{"name":"2021 26th Microoptics Conference (MOC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133850033","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}
Pub Date : 2021-09-26DOI: 10.23919/MOC52031.2021.9598048
Konami Yada, K. Ogawa
To realize 6G, we investigated Laguerre Gaussian mode multiplexing communication system capable of large capacity communication with long-distance propagation in atmospheric turbulence. As a results, it was confirmed that improvement of power loss and communication quality can be achieved simultaneously by considering the combined Laguerre-Gaussian modes.
{"title":"Characterization of Laguerre-Gaussian mode multiplexing in atmospheric turbulence for optical wireless communication","authors":"Konami Yada, K. Ogawa","doi":"10.23919/MOC52031.2021.9598048","DOIUrl":"https://doi.org/10.23919/MOC52031.2021.9598048","url":null,"abstract":"To realize 6G, we investigated Laguerre Gaussian mode multiplexing communication system capable of large capacity communication with long-distance propagation in atmospheric turbulence. As a results, it was confirmed that improvement of power loss and communication quality can be achieved simultaneously by considering the combined Laguerre-Gaussian modes.","PeriodicalId":355935,"journal":{"name":"2021 26th Microoptics Conference (MOC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123654027","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}
Pub Date : 2021-09-26DOI: 10.23919/MOC52031.2021.9598021
Kazuhiro Suzuki, H. Kishikawa, N. Goto, J. Fujikata
We propose a mode recognition method based on sparse coding for beams carrying orbital angular momentum. Intensity profiles of Laguerre-Gaussian (LG) beam having different topological charges (TCs) are used for sparse dictionary learning and recognition process. High-accuracy recognition is achieved for LG beams with TCs from 0 to 6.
{"title":"Orbital Angular Momentum Mode Recognition based on Sparse Coding","authors":"Kazuhiro Suzuki, H. Kishikawa, N. Goto, J. Fujikata","doi":"10.23919/MOC52031.2021.9598021","DOIUrl":"https://doi.org/10.23919/MOC52031.2021.9598021","url":null,"abstract":"We propose a mode recognition method based on sparse coding for beams carrying orbital angular momentum. Intensity profiles of Laguerre-Gaussian (LG) beam having different topological charges (TCs) are used for sparse dictionary learning and recognition process. High-accuracy recognition is achieved for LG beams with TCs from 0 to 6.","PeriodicalId":355935,"journal":{"name":"2021 26th Microoptics Conference (MOC)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123665778","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}
Pub Date : 2021-09-26DOI: 10.23919/MOC52031.2021.9598034
Ziqiao Ni, Hidetaka Terasawa, O. Sugihara
We demonstrated a flexible light-induced self-written (LISW) waveguide using soft material. A straight LISW optical waveguide with almost same core size as that of the input graded-index plastic optical fiber was actualized successfully. Optical interconnection by two-way irradiation and its flexibility were also demonstrated.
{"title":"Light-Induced Self-Written Waveguide Using Soft Material","authors":"Ziqiao Ni, Hidetaka Terasawa, O. Sugihara","doi":"10.23919/MOC52031.2021.9598034","DOIUrl":"https://doi.org/10.23919/MOC52031.2021.9598034","url":null,"abstract":"We demonstrated a flexible light-induced self-written (LISW) waveguide using soft material. A straight LISW optical waveguide with almost same core size as that of the input graded-index plastic optical fiber was actualized successfully. Optical interconnection by two-way irradiation and its flexibility were also demonstrated.","PeriodicalId":355935,"journal":{"name":"2021 26th Microoptics Conference (MOC)","volume":"61 1 Suppl 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124277686","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}
Pub Date : 2021-09-26DOI: 10.23919/MOC52031.2021.9598147
V. Mishra, Myeong Soo Kang
We investigate the soliton stability in multimode fiber with an optically induced temporal potential (TP). The soliton experiences a cross-phase-modulation-induced TP when co-propagating with a pump pulse. While without the TP both the spatiotemporal soliton and continuous wave are stable, the TP makes only the spatiotemporal soliton stationary and stable.
{"title":"Stability of Spatiotemporal Soliton in Multimode Fiber with Optically Induced Temporal Potential","authors":"V. Mishra, Myeong Soo Kang","doi":"10.23919/MOC52031.2021.9598147","DOIUrl":"https://doi.org/10.23919/MOC52031.2021.9598147","url":null,"abstract":"We investigate the soliton stability in multimode fiber with an optically induced temporal potential (TP). The soliton experiences a cross-phase-modulation-induced TP when co-propagating with a pump pulse. While without the TP both the spatiotemporal soliton and continuous wave are stable, the TP makes only the spatiotemporal soliton stationary and stable.","PeriodicalId":355935,"journal":{"name":"2021 26th Microoptics Conference (MOC)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115595273","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}
Pub Date : 2021-09-26DOI: 10.23919/MOC52031.2021.9598029
K. Kurokawa, Daiki Shimokura
We demonstrated that a propagating fiber fuse was terminated by using optical pulses as the input light in dispersion-shifted fiber with an input power of 3.4 W, which is three times larger than the fuse propagation threshold. The suppression of fuse initiation was also confirmed under the same input pulses.
{"title":"Termination of fiber fuse propagation using optical pulses","authors":"K. Kurokawa, Daiki Shimokura","doi":"10.23919/MOC52031.2021.9598029","DOIUrl":"https://doi.org/10.23919/MOC52031.2021.9598029","url":null,"abstract":"We demonstrated that a propagating fiber fuse was terminated by using optical pulses as the input light in dispersion-shifted fiber with an input power of 3.4 W, which is three times larger than the fuse propagation threshold. The suppression of fuse initiation was also confirmed under the same input pulses.","PeriodicalId":355935,"journal":{"name":"2021 26th Microoptics Conference (MOC)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122207952","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}
Pub Date : 2021-09-26DOI: 10.23919/MOC52031.2021.9598052
Gensai Tei, Kenta Kitamura, Long Liu, Y. Koyanagi, Daiki Sugawara, M. Watanabe
A Distributed Feedback waveguide with a diffraction grating on the Si/CaF2 heterostructurewaveguide is proposed for near-and mid-infrared applications. In this study, we focused on a Si-based quantum cascade laser structures. Simulation of the waveguide operating at a bragg wavelength of 1.70 [µm] shows that arbitrary transmittance and reflectance can be obtained by changing the grating conditions.
{"title":"Proposal and Analysis of Si/CaF2 Distributed Feedback Waveguide for near-and mid- infrared applications","authors":"Gensai Tei, Kenta Kitamura, Long Liu, Y. Koyanagi, Daiki Sugawara, M. Watanabe","doi":"10.23919/MOC52031.2021.9598052","DOIUrl":"https://doi.org/10.23919/MOC52031.2021.9598052","url":null,"abstract":"A Distributed Feedback waveguide with a diffraction grating on the Si/CaF2 heterostructurewaveguide is proposed for near-and mid-infrared applications. In this study, we focused on a Si-based quantum cascade laser structures. Simulation of the waveguide operating at a bragg wavelength of 1.70 [µm] shows that arbitrary transmittance and reflectance can be obtained by changing the grating conditions.","PeriodicalId":355935,"journal":{"name":"2021 26th Microoptics Conference (MOC)","volume":"13 26","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120925113","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}
Pub Date : 2021-09-26DOI: 10.23919/MOC52031.2021.9598139
Takumi Hinata, Y. Hayama, Naoki Sawayanagi, Tasuku Touma, K. Nakatsuhara, Masayuki Takeda, T. Nishizawa
We improved the dry-etching process for Nb2O5 horizontal slot waveguides to suppress roughness in etched surfaces. We have also fabricated horizontal slot waveguides by the improved process. In the fabricated waveguides, the smooth etched surface and the transmitted light were successfully obtained.
{"title":"Nb2O5 horizontal slot waveguides fabricated by an improved etching process","authors":"Takumi Hinata, Y. Hayama, Naoki Sawayanagi, Tasuku Touma, K. Nakatsuhara, Masayuki Takeda, T. Nishizawa","doi":"10.23919/MOC52031.2021.9598139","DOIUrl":"https://doi.org/10.23919/MOC52031.2021.9598139","url":null,"abstract":"We improved the dry-etching process for Nb2O5 horizontal slot waveguides to suppress roughness in etched surfaces. We have also fabricated horizontal slot waveguides by the improved process. In the fabricated waveguides, the smooth etched surface and the transmitted light were successfully obtained.","PeriodicalId":355935,"journal":{"name":"2021 26th Microoptics Conference (MOC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127951472","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}
Pub Date : 2021-09-26DOI: 10.23919/MOC52031.2021.9598037
Ryusei Momosaki, M. Sakamoto, Kohei Noda, T. Sasaki, Takeya Sakai, Yukitoshi Hattori, N. Kawatsuki, H. Ono
The incident angle dependence of the diffraction properties of orthogonal-circular polarization gratings (OCPGs) fabricated using a polymer liquid crystal exhibiting biaxial anisotropy have been investigated. It was found that a specific biaxial anisotropy reduces the incident angle dependence of optically thin OCPGs against the wavelength of an incident light.
{"title":"Investigation on diffraction properties of polarization gratings with optically biaxial anisotropy","authors":"Ryusei Momosaki, M. Sakamoto, Kohei Noda, T. Sasaki, Takeya Sakai, Yukitoshi Hattori, N. Kawatsuki, H. Ono","doi":"10.23919/MOC52031.2021.9598037","DOIUrl":"https://doi.org/10.23919/MOC52031.2021.9598037","url":null,"abstract":"The incident angle dependence of the diffraction properties of orthogonal-circular polarization gratings (OCPGs) fabricated using a polymer liquid crystal exhibiting biaxial anisotropy have been investigated. It was found that a specific biaxial anisotropy reduces the incident angle dependence of optically thin OCPGs against the wavelength of an incident light.","PeriodicalId":355935,"journal":{"name":"2021 26th Microoptics Conference (MOC)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128370685","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}
Pub Date : 2021-09-26DOI: 10.23919/MOC52031.2021.9598082
Shinho Lee, Min‐Kyo Seo
We present a sub-µm-scale plasmomechanical resonator and demonstrate optical excitation and detection of picometer-order longitudinal motion. The resonator allows measurement of mechanical oscillation signal over a broad wavelength of the probe laser. We also investigated the tunability and thermoelastic properties of mechanical resonance depending on pump power.
{"title":"Optical Excitation and Detection of Picometer-Order Longitudinal Motion in Sub-µm Plasmomechanical Resonator","authors":"Shinho Lee, Min‐Kyo Seo","doi":"10.23919/MOC52031.2021.9598082","DOIUrl":"https://doi.org/10.23919/MOC52031.2021.9598082","url":null,"abstract":"We present a sub-µm-scale plasmomechanical resonator and demonstrate optical excitation and detection of picometer-order longitudinal motion. The resonator allows measurement of mechanical oscillation signal over a broad wavelength of the probe laser. We also investigated the tunability and thermoelastic properties of mechanical resonance depending on pump power.","PeriodicalId":355935,"journal":{"name":"2021 26th Microoptics Conference (MOC)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124393669","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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