SPIE LASE最新文献_第2页

Flow sensor using a hollow whispering gallery mode microlaser 流量传感器采用空心低语通道模式微激光器

SPIE LASE Pub Date : 2016-04-22 DOI: 10.1117/12.2209205

J. Ward, Yong Yang, Síle Nic Chormaic

引用次数: 3

Lidar for monitoring methane emission in Siberian permafrost 用于监测西伯利亚永久冻土层甲烷排放的激光雷达

SPIE LASE Pub Date : 2016-04-22 DOI: 10.1117/12.2214742

A. Grishkanich, A. Zhevlakov, I. Sidorov, V. Elizarov, A. Mak, S. Kascheev

引用次数: 4

Problems of uniform focal spot formation by means of deformable mirror 变形镜均匀焦斑形成问题

SPIE LASE Pub Date : 2016-04-22 DOI: 10.1117/12.2222001

J. Sheldakova, A. Kudryashov, A. Lylova, V. Samarkin, A. Rukosuev

引用次数: 0

Mid-IR fused fiber couplers 中红外熔丝光纤耦合器

SPIE LASE Pub Date : 2016-04-22 DOI: 10.1117/12.2203450

G. Stevens, T. Woodbridge

{"title":"Mid-IR fused fiber couplers","authors":"G. Stevens, T. Woodbridge","doi":"10.1117/12.2203450","DOIUrl":"https://doi.org/10.1117/12.2203450","url":null,"abstract":"We present results from our recent efforts on developing single-mode fused couplers in ZBLAN fibre. We have developed a custom fusion workstation for working with lower melting temperature fibres, such as ZBLAN and chalcogenide fibres. Our workstation uses a precisely controlled electrical heater designed to operate at temperatures between 100 – 250°C as our heat source. The heated region of the fibers was also placed in an inert atmosphere to avoid the formation of microcrystal inclusions during fusion. We firstly developed a process for pulling adiabatic tapers in 6/125 μm ZBLAN fibre. The tapers were measured actively during manufacture using a 2000 nm source. The process was automated so that the heater temperature and motor speed automatically adjusted to pull the taper at constant tension. This process was then further developed so that we could fuse and draw two parallel 6/125 μm ZBLAN fibres, forming a single-mode coupler. Low ratio couplers (1-10%) that could be used as power monitors were manufactured that had an excess loss of 0.76 dB. We have also manufactured 50/50 splitters and wavelength division multiplexers (WDMs). However, the excess loss of these devices was typically 2 - 3 dB. The increased losses were due to localised necking and surface defects forming as the tapers were pulled further to achieve a greater coupling ratio. Initial experiments with chalcogenide fibre have shown that our process can be readily adapted for chalcogenide fibres. A 5% coupler with 1.5 dB insertion loss was manufactured using commercial of the shelf (COTS) fibres.","PeriodicalId":314691,"journal":{"name":"SPIE LASE","volume":"68 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":"129989865","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: 20

III-V-semiconductor vertically-coupled whispering-gallery mode resonators made by selective lateral oxidation 由选择性横向氧化制成的iii - v型半导体垂直耦合低语廊模式谐振器

SPIE LASE Pub Date : 2016-04-22 DOI: 10.1117/12.2210968

S. Calvez, G. Lafleur, C. Arlotti, Alexandre Larrue, Pierre-François Calmon, A. Arnoult, G. Almuneau, O. Gauthier-Lafaye

{"title":"III-V-semiconductor vertically-coupled whispering-gallery mode resonators made by selective lateral oxidation","authors":"S. Calvez, G. Lafleur, C. Arlotti, Alexandre Larrue, Pierre-François Calmon, A. Arnoult, G. Almuneau, O. Gauthier-Lafaye","doi":"10.1117/12.2210968","DOIUrl":"https://doi.org/10.1117/12.2210968","url":null,"abstract":"Integrated whispering-gallery mode resonators are attractive devices which have found applications as selective filters, low-threshold lasers, high-speed modulators, high-sensitivity sensors and even as nonlinear converters. Their performance is governed by the level of detrimental (scattering, bulk, bending) loss incurred and the usable loss represented by the coupling rate between the resonator and its access waveguide. Practically, the latter parameter can be more accurately controlled when the resonator lies above the access waveguide, in other words, when the device uses a vertical integration scheme. So far, when using such an integration technique, the process involved a rather technically challenging step being either a planarization or a substrate transfer step. In this presentation, we propose and demonstrate an alternative method to fabricate vertically-coupled whispering-gallery mode resonators on III-V semiconductor epitaxial structures which has the benefit of being planarization-free and performed as single-side top-down process. The approach relies on a selective lateral thermal oxidation of aluminum-rich AlGaAs layers to define the buried access waveguide and enhance the vertical confinement of the whispering-gallery mode into the resonator. As a first experimental proof-of-principle of this approach, 75 µm-diameter micro-disk devices exhibiting quality factor reaching ~4500 have been successfully made.","PeriodicalId":314691,"journal":{"name":"SPIE LASE","volume":"8 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":"130424525","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

Power scaling of a wavelength-narrowed diode laser system for pumping alkali vapors 抽吸碱蒸汽的窄波长二极管激光系统的功率缩放

SPIE LASE Pub Date : 2016-04-22 DOI: 10.1117/12.2211356

F. Hersman, J. H. Distelbrink, J. Ketel, J. Wilson, D. Watt

引用次数: 5

Packaging of wavelength stabilized 976nm 100W 105µm 0.15 NA fiber coupled diode lasers 封装波长稳定的976nm 100W 105µm 0.15 NA光纤耦合二极管激光器

SPIE LASE Pub Date : 2016-04-22 DOI: 10.1117/12.2212139

Xiaochen Jiang, Rui Liu, Yanyan Gao, T. Zhang, Xiaoguang He, Jing Zhu, Qiang Zhang, Thomas Yang, Cui-peng Zhang

{"title":"Packaging of wavelength stabilized 976nm 100W 105µm 0.15 NA fiber coupled diode lasers","authors":"Xiaochen Jiang, Rui Liu, Yanyan Gao, T. Zhang, Xiaoguang He, Jing Zhu, Qiang Zhang, Thomas Yang, Cui-peng Zhang","doi":"10.1117/12.2212139","DOIUrl":"https://doi.org/10.1117/12.2212139","url":null,"abstract":"Fiber coupled diode lasers are widely used in many fields now especially as pumps in fiber laser systems. In many fiber laser applications, high brightness pumps are essential to achieve high brightness fiber lasers. Furthermore, 976nm wavelength absorption band is narrow with Yb3+ doped fiber lasers which is more challenging for controlling wavelength stabilized in diode laser modules. This study designed and implemented commercial available high brightness and narrow wavelength width lasers to be able to use in previous mentioned applications. Base on multiple single emitters using spatial and polarization beam combining as well as fiber coupling techniques, we report a wavelength stabilized, 105μm NA 0.15 fiber coupled diode laser package with 100W of optical output power at 976 nm, which are 14 emitters inside each multiple single emitter module. The emitting aperture of the combined lasers output are designed and optimized for coupling light into a 105μm core NA 0.15 fiber. Volume Bragg grating technology has been used to improve spectral characteristics of high-power diode lasers. Mechanical modular design and thermal simulation are carried out to optimize the package. The spectral width is roughly 0.5 nm (FWHM) and the wavelength shift per °C < 0.02nm. The output spectrum is narrowed and wavelength is stabilized using Volume Bragg gratings (VBGs). The high brightness package has an electrical to optical efficiency better than 45% and power enclosure more than 90% within NA 0.12. Qualification tests have been included on this kind of package. Mechanical shock, vibration and accelerated aging tests show that the package is reliability and the MTTF is calculated to be more than 100k hours at 25°C.","PeriodicalId":314691,"journal":{"name":"SPIE LASE","volume":"16 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":"116215139","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

High-Q GRIN resonators 高q GRIN谐振器

SPIE LASE Pub Date : 2016-04-22 DOI: 10.1117/12.2214409

A. Armani, S. Soltani, Hyungwoo Choi, V. Diep, A. Kovach, K. Kuo

{"title":"High-Q GRIN resonators","authors":"A. Armani, S. Soltani, Hyungwoo Choi, V. Diep, A. Kovach, K. Kuo","doi":"10.1117/12.2214409","DOIUrl":"https://doi.org/10.1117/12.2214409","url":null,"abstract":"High and ultra-quality factor (Q) optical resonators have been used in numerous applications, ranging from biodetection and gyroscopes to nonlinear optics. In the majority of the measurements, the fundamental optical mode is used as it is easy to predict its behavior and subsequent response. However, there are numerous other modes which could give improved performance or offer alternative measurement opportunities. For example, by using a mode located farther from the device surface, the optical field becomes less susceptible to changes in the environment. However, selectively exciting a pre-determined, non-fundamental mode or, alternatively, creating a “designer” mode which has one’s ideal properties is extremely challenging. One approach which will be presented is based on engineering a gradient refractive index (GRIN) cavity. We use a silica ultra-high-Q toroidal cavity as a starting platform device. On top of this structure, we can controllably deposit, layer or grow different materials of different refractive indices, with nm-scale precision, creating resonators with a GRIN region co-located with the optical field. Slight adjustments in the thicknesses or indices of the films result in large changes in the mode which is most easily excited. Even in this architected structure, we have maintained Q>1 million. Using this approach, we have demonstrated the ability to tune the properties of the device. For example, we have changed the thermal response and the UV response of a device by over an order of magnitude.","PeriodicalId":314691,"journal":{"name":"SPIE LASE","volume":"6 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":"115262891","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

Optical attachment for spatial transformation of excimer laser beam 准分子激光束空间变换的光学附件

SPIE LASE Pub Date : 2016-04-22 DOI: 10.1117/12.2214706

A. Zhevlakov, A. Grishkanich, S. Kascheev, V. Kujanpää, T. Savinainen, E. Gavrilov

引用次数: 2

Integrated pulse stretchers for high-energy CPA and OPCPA systems 集成脉冲拉伸器，用于高能CPA和OPCPA系统

SPIE LASE Pub Date : 2016-04-22 DOI: 10.1117/12.2212900

L. Shah, N. Bodnar, P. Roumayah, B. Webb, J. Bradford, M. Richardson

引用次数: 1