飛秒泵浦探測光譜儀

ExciPro是一型以飛秒激光器作為泵浦和探測光源的瞬態(tài)吸收光譜儀，是研究超快動力學(xué)過程的得力工具。該套儀器基于使用簡單、測量的設(shè)計目的，優(yōu)化使用各種光機(jī)組件，保證了用戶在使用過程中可以將儀器的維護(hù)工作量降到zui低。

ExciPro內(nèi)置了一臺高精度的光學(xué)延遲線，通過軟件控制，可以精準(zhǔn)地選擇源自同一臺飛秒激光器的同一光脈沖到達(dá)樣品，發(fā)生“重疊”的時刻，從而可以逐次地通過線陣探測器將不同時刻的光譜采集出來，然后再借助軟件的分析功能，將發(fā)生在短時間內(nèi)的瞬態(tài)吸收過程，用光譜的形式真實(shí)而全面地記錄下來，達(dá)成探索超快動力學(xué)過程的目的。

飛秒泵浦探測光譜儀主要技術(shù)特點(diǎn)為：

- Turnkey transient absorption pump-probe femtosecond spectroscopy system
- Multichannel and single-channel detection of photoinduced optical density changes （Delta OD）.
- Detection of transient absorption in solutions, thin films and solid samples
- < 100 fs temporal resolution
- Probe and reference channels
- Computer controlled imaging spectrometer with four-grating turret
- NMOS linear image sensors with high signal-to-noise ratio
- Internal all reflective white light continuum generator
- Internal second harmonic generator for the sample excitation
- Optional CDP 2017 optical parametric amplifier for single-channel probe
- ExciPro 2.5 software for data acquisition, transient spectra analysis and chirp compensation

主要技術(shù)參數(shù)為：

- Multichannel visible probe spectral range: 350 nm - 1000 nm
- Multichannel infrared probe spectral range: 900 nm - 1600 nm
- Single-channel probe spectral range: 250 nm - 2500 nm
- Maximum delay between probe and excitation pulses: 2.0 ns （4.0 ns in the optional double-pass
configuration）
- Minimum step of the optical delay line: 1.56 fs
- Maximum pulse repetition rate at multichannel detection: 1 kHz