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WP-600/600-25.4
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Laser Pulse Compression & Stretching激光脉冲压缩/拉伸器 飞秒皮秒短脉冲生成器
Highly effective compression and stretching of picosecond and femtosecond laser pulses can be accomplished by using matched pairs of Volume Phase Holographic Gratings (VPHGs) in transmission geometry. As shown in the figure below, compression and stretching is proportional to the distance between the parallel gratings. A mirror can be inserted to double the dispersion and/or two identical lenses can be placed two focal lengths apart for compression purposes.
Benefits
Diffraction efficiencies >90%, combined with angles up to 70 degrees for S (TE) polarization, produce high throughput, compact devices.
Example Graph Below of 1213 lpmm grating (70.1 degrees) for 1550nm
Energy Density Information
We are collecting energy density data from various pulsed laser companies. Energy density failure is a mostly a function of the glue/gelatin/glass assembly with the glue usually failing first by softening. Below is information typical of a successful medical pulsed laser application. Continuous wave (CW) energy densities of up to ~10 watts/cm^2 are fine; up to ~100 10 watts/cm^2 is possible with suitable epoxies.
Description
External cavity diode and dye lasers can be spectrally tuned and made to operate in a single-mode. Light exiting from the laser cavity diverges, passes through a collimator, and is imaged on a grating. In Littrow and Littman configurations, the grating is positioned so that light of the correct wavelength is redirected back through the collimator and focused into the laser cavity. Gratings for single or dual polarizations can be produced.
Grating Enhanced External Cavity Laser Diode (GEECLD): Graphs & diagrams courtesy of Andreas Wicht, University of Dusseldorf
Description
External cavity diode and dye lasers can be spectrally tuned and made to operate in a single-mode. Light exiting from the laser cavity diverges, passes through a collimator, and is imaged on a grating. In Littrow and Littman configurations, the grating is positioned so that light of the correct wavelength is redirected back through the collimator and focused into the laser cavity. Gratings for single or dual polarizations can be produced.
Grating Enhanced External Cavity Laser Diode (GEECLD): Graphs & diagrams courtesy of Andreas Wicht, University of Dusseldorf
Tunable Diffraction Efficiency (>90%): High diffraction efficiencies are helpful to detune the laser far away from gain maximum. Alternatively, to circumvent the gain maximum, especially at high currents, lower diffraction efficiencies are preferred.
Higher Spatial Frequencies (=> More Compact): In all Littman diode setups, transmission gratings allow the application of line densities which are about twice as large as for reflection gratings. This is because the first order is diffracted back into the laser diode, and not at ~90 degrees with respect to the incident beam.
Maximum Diffraction Efficiency: Higher efficiency than commercial reflection gratings.
Continuous Tuning Over A Wide Band
Stock: Dual Polarization VPH Transmission Gratings: AOI=AOD
Stock: Dual Polarization VPH Transmission Gratings: AOI=AOD
These VPHGs can be customized for almost any wavelength or spatial frequency, are environmentally rugged, and scratch resistant. Process Instruments uses of our volume phase holographic gratings for their diode laser systems.
We provide a high level of customer service. Additionally, we offer consulting, design, prototype, product integration, and quantity production at competitive prices.
请联系我们中国区独家代理：
筱晓（上海）光子技术有限公司了解更多产品详情。
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WP-600/600-25.4
WP-600/1550-25.4
WP-600/1550-50.8
WP-960/900-30
WP-HD1145/1310-25.4
WP-HD1145/1310-50.8
WP-1200/840-25.4
WP-1200/840-50.8
WP-HD1800/840-25.4
WP-HD1800/840-50.8
WP-HD1624/871-25.4
WP-HD1624/871-50.8
| 用户单位 | 采购时间 |
|---|---|
| 北京大学 | 2015-03-02 |
