Photonics Asia最新文献_第3页

Theoretical research on one-third harmonic generation process in optical microfibers 光学微光纤中三分谐波产生过程的理论研究

Photonics Asia Pub Date : 2014-11-24 DOI: 10.1117/12.2070328

Jianyu Zhang, Yunxu Sun

引用次数: 0

Research on the infrared image processing algorithm based on FPGA 基于FPGA的红外图像处理算法研究

Photonics Asia Pub Date : 2014-11-21 DOI: 10.1117/12.2069184

Lidong Xin

引用次数: 0

MBE growth and fabrication of 2.Xμm InGa(As)Sb/AlGaAsSb laser 2. MBE的生长与制备Xμm InGa(As)Sb/AlGaAsSb激光器

Photonics Asia Pub Date : 2014-11-21 DOI: 10.1117/12.2071640

Yu Zhang, Yuzhi Song, Jun-Liang Xing, Y. Liao, Chuanchuan Li, Ying-qiang Xu, Yun Xu, Guofeng Song, Zhichuan Niu

引用次数: 1

Efficient phase-matched third harmonic generation from mid-IR to near-IR regions in a double asymmetric plasmonic slot waveguide 双非对称等离子体缝隙波导中红外到近红外区域的高效相位匹配三次谐波产生

Photonics Asia Pub Date : 2014-11-21 DOI: 10.1117/12.2066964

Tingting Wu, Yunxu Sun, P. Shum, Xuguang Shao, Tianye Huang

{"title":"Efficient phase-matched third harmonic generation from mid-IR to near-IR regions in a double asymmetric plasmonic slot waveguide","authors":"Tingting Wu, Yunxu Sun, P. Shum, Xuguang Shao, Tianye Huang","doi":"10.1117/12.2066964","DOIUrl":"https://doi.org/10.1117/12.2066964","url":null,"abstract":"Recent years, the research of mid-infrared (mid-IR) photonics has inspired increasingly interest due to their potential applications in a wide variety of areas, including free-space communications, chemical or biological sensors, environmental monitors, thermal imaging, IR countermeasures and medical procedures. On the other hand, third harmonic generation (THG) has been demonstrated to be a versatile tool to realize high speed optical performance monitoring of in-band OSNR and residual dispersion. The mid-IR light sources based third-order frequency conversion opens an entirely new realm of nonlinear interactions. Nevertheless, rare experimental or analytical THG modeling has been published. In this work, we theoretically investigate the possible efficient phase-matched THG in a double symmetric plasmonic slot waveguide (DAPSW) based on a mid-IR light source. Nonlinear organic material DDMEBT with thirdorder susceptibility of χ(3) = 1×10-19 m2/V2 is integrated into the top metallic slot region as the main slot core medium. Silicon (Si) is used to fill the bottom metallic slot region. Silver (Ag) is considered to be the metal medium due to its low Ohmic loss. The needed phase-matching condition (PMC) is satisfied between the zeroth mode at fundamental frequency (FF) and the first mode at third harmonic (TH) by appropriate designing the waveguide geometrical parameters. The associated parameters such as the width and height of the slot, pump-harmonic modal overlap, figureof- merit (FOM), pump power and detuning have been numerically investigated in detail. Finally, the conversion efficiency comes up to 1.69×10-5 with pump power of 1 W and the corresponding waveguide length is 10.8 μm.","PeriodicalId":164339,"journal":{"name":"Photonics Asia","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121732951","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}

引用次数: 0

The effect of zinc diffusion on extinction ratio of MQW electroabsorption modulator integrated with DFB laser 锌扩散对集成DFB激光的MQW电吸收调制器消光比的影响

Photonics Asia Pub Date : 2014-11-21 DOI: 10.1117/12.2073556

Daibing Zhou, Ruikang Zhang, Huitao Wang, Baojun Wang, J. Bian, X. An, Lingjuan Zhao, Hongliang Zhu, C. Ji, Wei Wang

{"title":"The effect of zinc diffusion on extinction ratio of MQW electroabsorption modulator integrated with DFB laser","authors":"Daibing Zhou, Ruikang Zhang, Huitao Wang, Baojun Wang, J. Bian, X. An, Lingjuan Zhao, Hongliang Zhu, C. Ji, Wei Wang","doi":"10.1117/12.2073556","DOIUrl":"https://doi.org/10.1117/12.2073556","url":null,"abstract":"Monolithically integrated electroabsorption modulated lasers (EML) are widely being used in the optical fiber communication systems, due to their low chip, compact size and good compatible with the current communication systems. In this paper, we investigated the effect of Zinc diffusion on extinction ratio of electroabsorption modulator (EAM) integrated with distributed feedback laser (DFB). EML was fabricated by selective area growth (SAG) technology. The MQW structure of different quantum energy levels was grown on n-type InP buffer layer with 150nm thick SiO2 parallel stripes mask by selective area metal-organic chemical vapor deposition (MOCVD). A 35nm photoluminescence wavelength variation was observed between the laser area (λPL=1535nm) and modulator area (λPL=1500nm) by adjusting the dimension of parallel stripes. The grating (λ=1550nm) was fabricated in the selective area. The device was mesa ridge structure, which was constituted of the DFB laser, isolation gap and modulator. The length of every part is 300μm, 50μm, and 150μm respectively. Two samples were fabricated with the same structure and different p-type Zn-doped concentration, the extinction ratio of heavy Zn-doped device is 12.5dB at -6V. In contrast, the extinction ratio of light Zn-doped device is 20dB at -6V, that was improved for approximate 60%. The different Zn diffusion depth into the MQW absorption layer was observed by Secondary ion mass spectrometer (SIMS). The heavy Zn-doped device diffused into absorption layer deeper than the light Zn-doped device, which caused the large non-uniformity of the electric field in the MQW layer. So the extinction ratio characteristics can be improved by optimizing the Zn-doped concentration of p-type layer.","PeriodicalId":164339,"journal":{"name":"Photonics Asia","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114904996","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}

引用次数: 6

Initiation efficiency and cytotoxicity of a series of water-soluble benzylidene cyclopentanone for two-photon polymerization 一系列水溶性苄基环戊酮双光子聚合的引发效率和细胞毒性

Photonics Asia Pub Date : 2014-11-21 DOI: 10.1117/12.2071644

Xiaopu Wang, Yanyan Fang, Qianli Zou, Yuxia Zhao, Feipeng Wu

{"title":"Initiation efficiency and cytotoxicity of a series of water-soluble benzylidene cyclopentanone for two-photon polymerization","authors":"Xiaopu Wang, Yanyan Fang, Qianli Zou, Yuxia Zhao, Feipeng Wu","doi":"10.1117/12.2071644","DOIUrl":"https://doi.org/10.1117/12.2071644","url":null,"abstract":"The 3D fabrication of bio-compatible materials under an aqueous environment is a fundamental requirement for tissue engineering. In this work, a series of polyethylene glycol- (PEG-), carboxylate anionic group- or pyridyl cationic groupfunctionalized benzylidene cyclopentanone photo-initiators (B2, B3, X2, X3, Y1 and P1) were synthesized. Their water-solubility, photophysical properties and cytotoxicity were investigated. Using eosin as reference, their initiation efficiencies in water-soluble photoactive formulation (SR610 with 20% of DI water) excited by one- or two-photon were studied. The results showed that there were no significant differences on partial linear photophysical properties of these initiators, such as [see manuscript] and [see manuscript], but differences on their (see manuscript), Φ, and σmax are clear. In addition, their cytotoxicity is different. Two PEG-functionalized initiators (B3 and X3) with two PEG groups on one side of benzylidene cyclopentanone cores have obvious toxicity, while other four intiators are safety to HepG2 cells at the concentration of 20 μM. Moreover, the water-solubility of X2 and X3 (containing two longer PEG) were much better than those of other four initiators. Using these initiators, 3D micro-structures fabricated by two-photon polymerization of water-soluble acrylate all could be achieved. In addition, their threshold energies were all lower than 0.5 mW. However, the stiffness of 3D micro-structures was affected by the water-solubility of these photo-initiators. Those structures built by formulations containing X2 and X3 would collapse easily. Conversely, other structures could sustain very well. This work proves that B2，Y1，and P1 have extensive application prospects in 3D fabrication for tissue engineering.","PeriodicalId":164339,"journal":{"name":"Photonics Asia","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116834120","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}

引用次数: 2

Simulation of wavefront sensorless correction based on Stochastic Parallel Gradient Descent algorithm 基于随机并行梯度下降算法的波前无传感器校正仿真

Photonics Asia Pub Date : 2014-11-21 DOI: 10.1117/12.2066146

G. Wang

引用次数: 0

Comparison of 1470nm laser and 1470nm laser heat head for ex-vivo kidney tissue cutting: a preliminary study 1470nm激光与1470nm激光热头在离体肾组织切割中的比较初步研究

Photonics Asia Pub Date : 2014-11-20 DOI: 10.1117/12.2071194

Zhentian Zhou, Lupeng Zhang, Jiafeng Liu, Zhi Shun, Wenzhi Li, Zhuwen Liu, Zhiyuan Liang

引用次数: 0

Miniaturized endoscopic probe for optical coherence tomography with a tiny magnet driving device 用于光学相干层析成像的微型内窥镜探针，带有微型磁铁驱动装置

Photonics Asia Pub Date : 2014-11-20 DOI: 10.1117/12.2071433

Ziwei Pang, Jigang Wu

引用次数: 1

Measurement of the mid-infrared Fourier spectroscopic imaging of whole human face by portable apparatus (size: 50*50 mm, weight: 200 g) 便携式仪器测量全人脸中红外傅立叶光谱成像(尺寸:50*50 mm，重量:200 g)

Photonics Asia Pub Date : 2014-11-20 DOI: 10.1117/12.2071422

W. Qi, Yo Suzuki, Masaru Fujiwara, Tsubasa Saito, Satoru Suzuki, P. Abeygunawardhana, Kenji Wada, A. Nishiyama, I. Ishimaru

{"title":"Measurement of the mid-infrared Fourier spectroscopic imaging of whole human face by portable apparatus (size: 50*50 mm, weight: 200 g)","authors":"W. Qi, Yo Suzuki, Masaru Fujiwara, Tsubasa Saito, Satoru Suzuki, P. Abeygunawardhana, Kenji Wada, A. Nishiyama, I. Ishimaru","doi":"10.1117/12.2071422","DOIUrl":"https://doi.org/10.1117/12.2071422","url":null,"abstract":"In the daily living space, measurement of the biological-substance distributions such as sebum can be realized by the proposed method of imaging-type 2-dimensional Fourier spectroscopy. This method has the strong robustness for mechanical vibrations. So, the spectrometer (size: 50*50mm, weight: 200g) can be produced without anti-vibration mechanism. Moreover, the phase shifter is a core part of the spectrometer, and it is constructed by the low-price bimorph type actuator which is depending on the vibration control of the piezoceramic in proposed method. It is appropriate as the actuator of the phase shifter from the evaluation results of the actuator straightness and position accuracy in the midinfrared region. As we know, the Fourier spectroscopy has a high light utilization efficiency. Therefore, the low price microbolometer can be used as the imaging sensor. So, the low-price (10,000 U.S. dollars), compact and high portability spectrometer can be produced. Furthermore, the much higher position accuracy in the short wavelength region is requested as we know, the phase shift correction method has been proposed. In this paper, high performance evaluations of the portable spectroscopy apparatus have been discussed by using the CO2 laser spectroscopy results in the midinfrared region. Then, the phase shift correction method was explained. At the end, we demonstrated the feasibility of the mid-infrared imaging of whole human faces without active illuminations.","PeriodicalId":164339,"journal":{"name":"Photonics Asia","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123721702","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}

引用次数: 4