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AA-M顯微鏡掃描自相關儀
特點:
20 fs-12 ps脈寬范圍
外接和內置光電探測器
掃描頻率,0.1-20 Hz
線性畸變:<1 %
USB接口和軟件
全反射光學元件
位置測量
條紋分辨自相關函數
無摩擦運動
旁路功能
AA-M提供兩個同時測量點:一個位于顯微鏡焦平面上,另一個位于儀器的光學頭位置,比如,顯微鏡輸入之前。測量的這兩個脈寬值進行對比決定了顯微鏡光學元件色散帶來的脈沖展寬。顯微鏡中超短脈沖的大多數應用是表征顯微鏡焦點處光束的時間和空間輪廓。這些測量結果對任何實驗都很重要,脈沖越短,非線性成像過程(雙光子激發)的效率越高,實驗成功需要的激發能量越少。在決定樣品曝光時需要光束參數表征,確保圖像好和正確的強度水平,因為錯誤的值可能會導致樣品損壞。
儀器使用USB接口,可以連接Windows操作系統的計算機。提供多種軟件工具。采集的脈寬數據可視化,可存儲或導出txt或dat文件。可以計算并實時顯示自相關函數和*終FWHM飛秒脈寬。而且,可以高斯或雙曲線擬合,也可查看強度函數。統計分析功能可以對幾個單獨的脈沖測量結果進行對比。
AA-M | |
Possible full wavelength range* | 450-2000 nm |
Subranges*(exchangeable photodetectors/beam splitter sets) | V**: 450-700 nm R1: 700-1300 nm R2: 1300-2000 nm |
Input pulse duration range | 20 fs -12 ps |
Number of photodetectors for one range | two (internal and external for sample position) |
Input pulse repetition rate | >10 kHz |
Typical sensitivity (Pav*Ppeak) | 100 mW2 |
Input polarization | linear, horizontal (vertical upon request) |
Scan rate | 0.1-20 Hz |
Linear distortion | <1% |
Collinear (interferometric and intensity) autocorrelation | yes |
PC connection | USB, Windows PC acquisition and analysis software is included in the standard package |
Necessary equipment | Windows PC platform or an oscilloscope |
Signal source and detector | Two-photon conductivity in semiconductor |
Dimensions | 210x164x132 mm (optical unit) 225x190x45 mm (control unit) 70х55х16.5 mm (external photodetector) |
* - the autocorrelator may cover one, two or all three subranges with exchangeable photodetectors/beam splitter sets (1, 2 or all 3 sets may be included in the package depending on required laser source specifications); ** - the 450-700 nm subrange may only be purchased with the main unit order. |