MULTIPLEX COHERENT RAMAN SPECTROSCOPY DETECTOR AND METHOD
摘要
A multiplex coherent Raman spectrometer (10) and spectroscopy method rapidly detects and identifies individual components of a chemical mixture separated by a separation technique, such as gas chromatography. The spectrometer (10) and method accurately identify a variety of compounds because they produce the entire gas phase vibrational Raman spectrum of the unknown gas. This is accomplished by tilting a Raman cell (20) to produce a high-intensity, backward-stimulated, coherent Raman beam of 683nm, which drives a degenerate optical parametric oscillator (28) to produce a broadband beam of 1100-1700nm covering a range of more than 3000 wavenumber. This broadband beam is combined with a narrowband beam of 532nm having a bandwidth of 0.003 wavenumbers and focused into a heated windowless cell (38) that receives gases separated by a gas chromatograph (40). The Raman radiation scattered from these gases is filtered and sent to a monochromator (50) with multichannel detection.
申请公布号
WO0248660(A8)
申请公布日期
2002.08.15
申请号
WO2001US45852
申请日期
2001.12.13
申请人
SPELMAN COLLEGE;CHEN, PETER;JOYNER, CANDACE, C.;PATRICK, SHEENA, T.;GUYER, DEAN, R.
发明人
CHEN, PETER;JOYNER, CANDACE, C.;PATRICK, SHEENA, T.;GUYER, DEAN, R.