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High-sensitivity NIR Raman spectrometer

Teledyne Princeton Instruments has introduced the TPIR-785 Raman spectrometer, an ultra-high-sensitivity spectrometer for NIR Raman spectroscopic application areas such as biology, medical research and life science where NIR excitation lasers (785 nm and 830 nm) are preferred. It uses an f/2 spectrograph with custom-designed lens optics to provide high light throughput and imaging quality in the NIR spectral range. The TPIR-785 also allows users to tailor the instrument’s performance for optimal spectral resolution (up to 5 cm–1) or optimal spectral range (up to 80–3650 cm–1). The system includes a 785 nm Raman probe, a universal fibre adaptor, a manual adjustable slit, and a high-power and temperature-stabilised 785 nm laser.

The TPIR-785 Raman system uses a proprietary CCD that has NIR quantum efficiency >70 % at 1000 nm. This “super-deep-depletion” sensor has a 1340 × 400 array composed of 20 µm square pixels and can be thermoelectrically cooled to –90° C for ultra-low dark current, allowing integration times from 10 µs to hours. The detector has spectral rates higher than 1 kHz, readout speeds up to 16 MHz and employs two readout ports. A new NIR optimised eXcelon™ process eliminates etaloning fringes and improves quantum efficiency. The high imaging quality spectrograph paired with large format detector allows the use of large fibre bundles for improved collection efficiency or Raman imaging measurement.

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