可調(diào)諧窄帶寬濾波器 (Laser Line Tunable filter)
LLTF是一種基于全息體布拉格光柵的非色散可調(diào)帶通濾波器俗批。它提供了行業(yè)中相對(duì)更高的信號(hào)吞吐量，而且它的獨(dú)特之處在于它結(jié)合了高光密度(> OD6)和出色的帶外抑制與超寬的可調(diào)范圍市怎。單個(gè)濾波器可以在400 nm到1000 nm (VIS)或1000 nm到2300 nm (SWIR)之間進(jìn)行調(diào)諧岁忘，帶寬(FWHM)分別小于2.5 nm和5 nm区匠。定制和擴(kuò)展光譜范圍(高達(dá)2500納米)和帶寬(亞納米)也可用臭觉。
同時(shí)，Photon新推出的CONTRAST EXT-IV型號(hào)實(shí)現(xiàn)了更寬波段的覆蓋辱志，用戶能夠用一臺(tái)LLTF實(shí)現(xiàn)對(duì)白光全波段（400 - 2500 nm）的濾波效果，可以很好地為用戶減小空間成本揩懒。
Illustration of the out-of-band rejection of a volume
holographic grating at λc= 632 nm. Bands of ±45 nm
are presented and an out-of-band rejection
of -60 dB is obtained.
Output from Photon etc’s tunable laser source. Visible option covering 400 - 1000 nm and SWIR option covering 1000 - 2500 nm.
PHOTON ETC獨(dú)特的光學(xué)濾波技術(shù)使得LLTF提供了較高的效率和帶外抑制什乙，是熒光和拉曼光譜中可調(diào)諧激發(fā)源的理想選擇已球。
產(chǎn)品特點(diǎn)：
效率高達(dá)60%
帶外抑制高
寬調(diào)諧范圍
自由空間或光纖耦合
用戶友好的控制軟件
輸入功率可達(dá)20W
提供諧波抑制臣镣、光線輸入輸出、光譜擴(kuò)展等可供選擇的配件選項(xiàng)
參數(shù)規(guī)格：
| CONTRAST VIS | CONTRAST SWIR | CONTRAST EXT-IV | CONTRAST X | |
SPECTRAL RANGE | 400 - 1000 nm | 1000 - 2300 nm (2500 nm optional) | 400 - 2300 nm (2500 nm optional) | where X represents a custom spectral range |
| BANDWIDTH (FWHM)*** | 1.0 nm - 2.5 nm | 2.0 nm - 5 nm | ≤ 2.5 (<1000 nm) ≤ 5.0 (>1000 nm) | High resolution: 0.15 nm - 0.9 nm |
| OUT OF BAND REJECTION**** | < -60 dB @ ± 40 nm | < -60 dB @ ± 80 nm (measured up to 1.7 μm) | < -60 dB @ ± 80 nm (measured up to 1.7 μm) | depends on the bandwidth |
| MAXIMUM INPUT AVERAGE POWER HP4: UP TO 4W HP8: UP TO 8W HP20: UP TO 20W | HP8, HP20 | HP8, HP20 | HP8, HP20 | HP4 |
| PEAK EFFICIENCY | typically around 65% | |||
| OPTICAL DENSITY (OD) | > OD6 (measured at 1064 nm) | TBD | ||
| DAMAGE THRESHOLD | < 5 GW/cm2 peak power @ 1064 nm, 8 ns | |||
| INPUT aperture DIAMETER | 5 mm | |||
| INPUT beam divergence REQUIREMENT | < 1 mrad | |||
| WAVELENGTH RELATIVE ACCURACY | FWHM / 8 | |||
| pointing STABILITY | < 1mm lateral dISPlacement @ 1 m from filter | |||
| scanning speed (MULTIPLE STEP) | 35 ms stabilization time for 0.1 nm step, 45 ms stabilization time for 0.2 nm step, 55 ms stabilization time for 1 nm step, 60 ms stabilization time for 2 nm step, 65 ms stabilization time for 5 nm step, 70 ms stabilization time for 10 nm step, | |||
| OPERATING SYSTEM (OS) | Windows 8 (64 bits) Windows 10 (64 bits) | |||
| SOFTWARE | PHySpec? included (SDK available) | |||
| COMPUTER CONNECTION | USB 2.0 (compatible 1.1) | |||
| DIMENSIONS (L x W x H) | 9'' x 6.3'' x 6.7'' (23 x 16 x 17) cm | 11.8'' x 9.1'' x 6.7'' (30 x 23 x 17.4) cm | 9'' x 6.3'' x 6.7'' (23 x 16 x 17) cm | |
| OPERATING TEMPERATURE | 10 to 40°C | |||
| STORAGE TEMPERATURE | 0 to 50°C | |||
| POWER SUPPLY | 100 - 240 V, 50 - 60 Hz | |||
| ENHANCED SWIR | N/A | * up to 2500 nm | ||
| ** EXTENDED AND REDUCED SPECTRAL RANGES ALSO AVAILABLE | e.g.: 500-2000 nm, 400-1700 nm, 500-900 nm, 500-650 nm, 650-1000 nm, 1000-1700 nm, 1700-2300 nm, etc. | |||
典型應(yīng)用：
?Photoluminescence (PL)
?Photoluminescence excitation (PLE)
?Reflection/Transmission spectroscopy
?Hyperspectral imaging
?Photovoltaic (EQE Mapping)
?fluorescence spectroscopy
?Photochemistry
?LBIC (Light Beam Induced Current)
?Steady State Pump-Probe experiment
?Detector calibration
?Photobiology
?Solar Simulators
注意：
輸入光束的散度要求不超過(guò)1 mrad，否則將無(wú)法有效工作阔蛉。
如需在自由空間配置中達(dá)到此規(guī)格弃舒，需要將濾波器與Photon etc背景抑制附件耦合。
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