SPIE LASE最新文献_第3页

Pulsed discharge production Ar* metastables 脉冲放电产生Ar*亚稳态

SPIE LASE Pub Date : 2016-04-22 DOI: 10.1117/12.2218122

Jiande Han, M. Heaven, D. Emmons, G. Perram, D. Weeks, W. Bailey

引用次数: 9

Teradiode's high brightness semiconductor lasers Teradiode的高亮度半导体激光器

SPIE LASE Pub Date : 2016-04-22 DOI: 10.1117/12.2218168

Robin K. Huang, B. Chann, James Burgess, B. Lochman, Wang-Long Zhou, Mike Cruz, R. Cook, Dan G. Dugmore, J. Shattuck, P. Tayebati

引用次数: 18

Deactivation and reaction of excited states of Rb in collisions with H2, CH4 and C2H6 Rb与H2、CH4和C2H6碰撞时激发态的失活和反应

SPIE LASE Pub Date : 2016-04-22 DOI: 10.1117/12.2218119

V. Azyazov, A. P. Torbin, A. Mebel, S. Bresler, M. Heaven

引用次数: 1

Spinning optical resonator sensor for torsional vibrational applications measurements 旋转光学谐振器传感器用于扭振测量

SPIE LASE Pub Date : 2016-04-22 DOI: 10.1117/12.2211873

Amir R. Ali, Andrew Gatherer, M. Ibrahim

{"title":"Spinning optical resonator sensor for torsional vibrational applications measurements","authors":"Amir R. Ali, Andrew Gatherer, M. Ibrahim","doi":"10.1117/12.2211873","DOIUrl":"https://doi.org/10.1117/12.2211873","url":null,"abstract":"Spinning spherical resonators in the torsional vibrational applications could cause a shift in its whispering gallery mode (WGM). The centripetal force acting on the spinning micro sphere resonator will leads to these WGM shifts. An analysis and experiment were carried out in this paper to investigate and demonstrate this effect using different polymeric resonators. In this experiment, centripetal force exerted by the DC-Motor on the sphere induces an elastic deformation of the resonator. This in turn induces a shift in the whispering gallery modes of the sphere resonator. Materials used for the sphere are polydimethylsiloxane (PDMS 60:1 where 60 parts base silicon elastomer to 1 part polymer curing agent by volume) with shear modulus (G≈1kPa), (PDMS 10:1) with shear modulus (G≈300kPa), polymethylmethacrylate (PMMA, G≈2.6×109GPa) and silica (G≈3×1010 GPa). The sphere size was kept constant with 1mm in diameter for all above materials. The optical modes of the sphere exit using a tapered single mode optical fiber that is coupled to a distributed feedback laser. The transmission spectrum through the fiber is monitored to detect WGM shifts. The results showed the resonators with smaller shear modulus G experience larger WGM shift due to the larger mechanical deformation induced by the applied external centripetal force. Also, the results show that angular velocity sensors used in the torsional vibrational applications could be designed using this principle.","PeriodicalId":314691,"journal":{"name":"SPIE LASE","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124992947","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

Acousto-optic devices for operation with 2μm fibre lasers 用于2μm光纤激光器的声光器件

SPIE LASE Pub Date : 2016-04-22 DOI: 10.1117/12.2209352

J. Ward, G. Stevens, P. Shardlow

{"title":"Acousto-optic devices for operation with 2μm fibre lasers","authors":"J. Ward, G. Stevens, P. Shardlow","doi":"10.1117/12.2209352","DOIUrl":"https://doi.org/10.1117/12.2209352","url":null,"abstract":"Fibre lasers operating in the 2μm region are of increasing interest for a range of applications, including laser machining and biomedical systems. The large mode area compared to 1μm fibre lasers combined with operation in an “eye-safe” region of the spectrum makes them particularly attractive. When developing fibre lasers at 1μm and 1·5μm manufacturers were able to call upon enabling technologies used by the telecoms industry, but at longer wavelengths, including 2μm, many such components are either unavailable or immature. We report on recent developments of Acousto-Optic Modulators and Tunable Filters that are specifically optimised for use with fibre systems operating at or around 2μm. AO devices are interesting due to their ability to conserve spatial-coherence, making them appropriate for use with single-mode optical fibres. We describe how the choice of interaction medium is an important consideration, particularly affecting the drive power and the polarisation behaviour of the device – the latter being an important parameter when used in a fibre system. We also describe two designs of AO Tunable Filter intended for laser tuning. Both designs have been demonstrated intracavity in 2μm fibre lasers. The first gives exceptionally narrow resolution (δλ/λ<0·1%). The second design is of a novel type of AOTF where a matched pair of AOTFs is configured to give a substantially net zero frequency-shift with little or no loss of pointing stability, any minor deviations in manufacture being self-compensated. Furthermore, small controlled frequency-shifts (up to about 10kHz) may be introduced with little or no detriment to the alignment of the system.","PeriodicalId":314691,"journal":{"name":"SPIE LASE","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123769313","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

Integrated disruptive components for 2µm fibre lasers (ISLA): project overview and passive component development 2µm光纤激光器(ISLA)的集成破坏性组件:项目概述和无源组件开发

SPIE LASE Pub Date : 2016-04-22 DOI: 10.1117/12.2207613

G. Stevens, T. Legg, P. Shardlow

{"title":"Integrated disruptive components for 2µm fibre lasers (ISLA): project overview and passive component development","authors":"G. Stevens, T. Legg, P. Shardlow","doi":"10.1117/12.2207613","DOIUrl":"https://doi.org/10.1117/12.2207613","url":null,"abstract":"In this paper, an overview of the EU FP7 project ISLA (Integrated disruptive componentS for 2 μm fibre Lasers) is given. The aim of ISLA was to develop a set of “building block” components and a “tool-kit” of processes to define an integrated modular common platform for two micron fibre lasers consisting of compatible and self-consistent active and passive fibres, fused fibre couplers and combiners, fibre-coupled isolators, modulators and high power pump laser diodes. We also present results from our work on developing passive components for 2 μm fibre lasers. This includes high power pump combiners that have been tested up to 0.5 kW and combiners for in-band pumping of holmium lasers. Couplers for use as splitters, power monitors and wavelength division multiplexers have also been demonstrated. Wideband couplers, with a coupling ratio that only varies ± 12% over 400 nm, have also been developed to exploit the wide tuning range possible with thulium fibre lasers. Research into different isolator materials was also conducted to find materials with large Verdet constants to be used in 2 μm isolators. Fibre-coupled isolators were then manufactured using a selection of these materials. Isolators that had insertion losses of < 1 dB and isolation of > 35 dB were demonstrated using PM and non-PM fibres. In the PM isolators, PER > 23 dB was achieved.","PeriodicalId":314691,"journal":{"name":"SPIE LASE","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121939012","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: 5

Observation of optically induced transparency in a micro-cavity 微腔中光学诱导透明度的观察

SPIE LASE Pub Date : 2016-04-22 DOI: 10.1117/12.2211622

Yuanlin Zheng, Jianjun Cao, W. Wan

引用次数: 0

Feedback module for evaluating optical-power stabilization methods 用于评估光功率稳定方法的反馈模块

SPIE LASE Pub Date : 2016-04-22 DOI: 10.1117/12.2208800

J. Downing

{"title":"Feedback module for evaluating optical-power stabilization methods","authors":"J. Downing","doi":"10.1117/12.2208800","DOIUrl":"https://doi.org/10.1117/12.2208800","url":null,"abstract":"A feedback module for evaluating the efficacy of optical-power stabilization without thermoelectric coolers (TECs) is described. The module comprises a pickoff optic for sampling a light beam, a photodiode for converting the sample power to electrical current, and a temperature sensor. The components are mounted on an optical bench that makes accurate (0.05°) beam alignment practical as well as providing high thermal-conductivity among the components. The module can be mounted on existing light sources or the components can be incorporated in new designs. Evaluations of optical and electronic stabilization methods are also reported. The optical method combines a novel, weakly reflective, weakly polarizing coating on the pickoff optic with a photodiode and an automatic-power-control (APC) circuit in a closed loop. The shift of emitter wavelength with temperature, coupled with the wavelength-dependent reflectance of the pickoff optic, enable the APC circuit to compensate for temperature errors. In the electronic method, a mixed-signal processor in a quasiclosed loop generates a control signal from temperature and photocurrent inputs and feeds it back to an APC circuit to compensate for temperature errors. These methods result in temperature coefficients less than 20 ppm/°C and relative rms power equal to 05% for the optical method and 0.02% for the electronic method. The later value represents an order of magnitude improvement over rms specifications for cooled, laser-diode modules and a five-fold improvement in wall-plug efficiency is achieved by eliminating TECs.","PeriodicalId":314691,"journal":{"name":"SPIE LASE","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127857318","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

Blue-emitting external cavity laser diode 蓝色发射外腔激光二极管

SPIE LASE Pub Date : 2016-04-22 DOI: 10.1117/12.2214017

Hong Man Na, H. Song, J. Park, J. H. Lee, Jung Ho Park

引用次数: 0

Narrow spectral width laser diode for metastable argon atoms pumping 用于亚稳氩原子抽运的窄谱宽激光二极管

SPIE LASE Pub Date : 2016-04-22 DOI: 10.1117/12.2207393

Jun Gao, Bin Li, Xinbing Wang, D. Zuo

引用次数: 0