Applications of Photonic Technology最新文献_第7页

Lasing properties of Nd:YVO4 crystals based on growth-axes 基于生长轴的Nd:YVO4晶体的激光特性

Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.474745

Patrick I. Woody, M. Raja, M. Shone

引用次数: 0

Temporal characterization for a multi-frequency erbium-doped fiber laser with frequency shifted feedback 频移反馈多频掺铒光纤激光器的时域特性

Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.473974

J. Maran, S. Larochelle

{"title":"Temporal characterization for a multi-frequency erbium-doped fiber laser with frequency shifted feedback","authors":"J. Maran, S. Larochelle","doi":"10.1117/12.473974","DOIUrl":"https://doi.org/10.1117/12.473974","url":null,"abstract":"Multi-wavelength sources are very attractive for optical telecommunication applications. Recently, several proposals have been made to use a frequency-shifting element inside a fiber laser ring cavity to realize a continuous wave (CW) multi-wavelength source operating at room temperature. In this type of laser, the frequency shift, introduced by an acousto-optic device, prevents the single frequency emission expected from the usual homogenous gain broadening behaviour of erbium-doped fiber. However, it has been previously observed that these sources can emit pulsed or CW radiation. In this paper, we describe the different emission regimes and we experimentally examine the impact of several key parameters on the optimization of the CW emission. To this end, a temporal characterization of the laser output was performed as a function of the cavity length, the number of simultaneously lasing wavelengths, the cavity loss, the erbium doped fiber length and the pump power. We found that an important parameter was the optical intensity circulating in the cavity. Indeed, the accumulated nonlinear phase shift and the amplifier saturation level are directly related to the intra-cavity laser field. By increasing the cavity loss or the number of wavelengths, the CW emission can be favoured over the mode-locked emission regime.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117121137","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: 3

Fourier-optical transverse mode selection in broad area lasers: experiment and simulation 广域激光器中的傅里叶光学横模选择:实验与仿真

Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.474844

S. Wolff, A. Rodionov, V. E. Sherstobitov, H. Fouckhardt

{"title":"Fourier-optical transverse mode selection in broad area lasers: experiment and simulation","authors":"S. Wolff, A. Rodionov, V. E. Sherstobitov, H. Fouckhardt","doi":"10.1117/12.474844","DOIUrl":"https://doi.org/10.1117/12.474844","url":null,"abstract":"Broad area lasers (BALs) with external Fourier-optical cavities with spatial filter for transverse mode selection are investigated experimentally and numerically. Nearfield and farfield distributions are calculated and compared to experimental results. Two different BALs, one with a high (10%) and the other with a very low residual reflectivity of the output facet (facing the external resonator) are operated in external Fourier-optical 4f setups. For the BAL mentioned first, transverse mode selection is obtained at low pump currents; the emission of the fundamental or a specific higher order transverse mode can be stabilized. In the latter BAL transverse modes can be selectively excited up to pump currents more than 200% above laser threshold. Numerical calculations reveal, that if this BAL within an external 4f-cavity is pumped even higher above laser threshold, it starts to operate in a self-Q-switched mode. Pulse duration and repetition rates are in the range of 2-4ns and 100-200MHz, respectively. Also, the concept and technology for fabrication of compact, miniaturized hybrid integrated Fourier-optical external cavities based on polymer waveguide mirrors is described. Experimental results of transverse mode selection in BALs with hybrid integrated-optical cavities are presented.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115221516","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: 1

Passively mode-locked stretched-pulse erbium-doped fiber ring laser with a regenerative feedback 再生反馈被动锁模拉伸脉冲掺铒光纤环形激光器

Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.473910

V. Roy, Martin Lamonde, F. Babin, M. Piché

引用次数: 0

Creation of micro-channels in a photosensitive As2S3 slab waveguide 光敏As2S3平板波导中微通道的创建

Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.473814

N. Hô, J. Laniel, R. Vallée, A. Villeneuve

引用次数: 2

Abnormally phenomena in Resolution Limit of Holographic Lenses 全息透镜分辨率极限中的异常现象

Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.477818

Li Zhu, Yiping Cui

引用次数: 1

Dynamic lightpath routing and wavelength assignment based on wavelength reservation 基于波长保留的动态光路路由和波长分配

Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.473979

Bin Zhou, Jun Zheng, H. Mouftah

引用次数: 0

Fabry-Perot interferometer-based electrooptic modulator using LiNbO3 and organic thin films 基于法布里-珀罗干涉仪的光电调制器，采用LiNbO3和有机薄膜

Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.473785

C. Banks, Anup Sharma, D. Frazier, B. Penn, H. Abdeldayem, A. Leyderman, M. Correa

引用次数: 0

Holographic characterization of fulgides doped polymer films 掺杂氟化镓聚合物薄膜的全息表征

Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.474839

C. Lafond, M. Bolte, R. Lessard

引用次数: 6

Optical anomalies in Biological media; Using naturally occurring birefringence and radiance dependent nonlinear optics to our advantage in the laser treatment of arrhythmias. 生物介质中的光学异常;利用自然发生的双折射和辐射依赖非线性光学我们的优势在激光治疗心律失常。

Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.474301

R. Splinter, R. Svenson, E. Sosa, Andre Luiz Buchele d'Avila, M. Scanavacca, Ernest Pruitt, J. Kasell

{"title":"Optical anomalies in Biological media; Using naturally occurring birefringence and radiance dependent nonlinear optics to our advantage in the laser treatment of arrhythmias.","authors":"R. Splinter, R. Svenson, E. Sosa, Andre Luiz Buchele d'Avila, M. Scanavacca, Ernest Pruitt, J. Kasell","doi":"10.1117/12.474301","DOIUrl":"https://doi.org/10.1117/12.474301","url":null,"abstract":"When irradiating particular biological media in general there will be a range of optical properties to deal with, with respect to the irradiating wavelength, and the respective tissues that make up the organ under treatment or being imaged. In addition to this we saw changing optical properties under influence of denaturization, dehydration and carbonization. We also observed optical nonlinearities that are irradiance dependent, in addition to the birefringence which affects the light distribution throughout the tissue differently than the polarization birefringence used in optical polarization microscopy. In the treatment of ventricular tachycardia with laser photocoagulation the success of the procedure depends on whether sufficient energy has been directed to the relevant region of the myocardium to ablate the entire arrhythmogenic focus. A new high power diode laser operating in the near infrared was used in an animal infarct model and in human arrhythmia ablation. The light distribution measured for Chagasic heart tissues at the diode laser wavelength demonstrated the key potential to create controlled deep photocoagulation lesions. From our observations we may conclude that the diode laser - catheter combination offers significant potential for the elimination of arrhythmia's resulting from Chagas disease.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126347387","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