Pro Lite Technology

Raman WP 785L Spectroscopy System

Raman Spectrometer

A turn-key system for fast, sensitive Raman

Wasatch Photonics offers best-in-class Raman spectrometer systems built upon the WP Raman ƒ/1.3 spectrometer engine to deliver the world’s fastest Raman spectrometers. Wasatch's high efficiency HD Volume Phase Holographic Grating and proprietary spectrometer design provides maximum diffraction efficiency and extremely low stray light. The WP Raman 785L features a laser integrated using free-space optics for rapid and low signal measurements. It also has options to add Bluetooth and a battery pack for portable applications. This spectrometer is 2x faster than the equivalent fiber-coupled spectrometers. The Wasatch f/1.3 fiber coupled spectrometers have 10x more throughput compared to a typical f/4 spectrometer. Custom wavelengths for OEM applications are available upon request.

Key features of the WP Raman 785L:

  • Wavelength range is 200cm-1 to 2000cm-1 (800 to 940nm)
  • HD Volume Phase Holographic Grating
  • Back-thinned Si CCD with low noise electronics
  • Extremely low stray light and high transmission
  • Short acquisition time and high SNR spectra
  • TEC cooling option available
  • Bluetooth option available

Wasatch supplies Dash Software, a platform developed specifically for data acquisition. Dash is able to continuously log data or take spectra individually to export for quantitative analysis. It is designed specifically to interface to existing software platforms or a custom software platform. Also included are software development kits (SDK’s) to enable development of software for specific platforms.

Dash software has been tested on Windows 7, Vista, XP and to a limited extent, XP embedded. While Windows 7, Vista and XP Service Pack 2 provide all of the required libraries for Dash functionality, certain XP embedded installations will require the installation of MS Visual Studio 2008 runtimes and other libraries. Please consult your embedded system build documentation for details on how to install these libraries. The best user experience comes with a Windows 7 64-bit system with an Intel i7 processor and at least 2GB of RAM.

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Optical Specs
F/#: 1.3
Grating: HD 1624 lpm VPH
Slit height: 1mm
Slit width: 0.05mm
Range: 200 to 2000cm-1 (800-940nm)
Blocking filter: laser rejection
Resolution: 9cm-1
Size: 12.7 x 16.5 x 5.1cm

Detector Specs

Detector: Hamamatsu
S11510-1006 CCD
Active pixels: 1024 x 64
Active area: 14.336 x 0.896mm
QE: 78% (max), 60% (mean)
Integration time: 1ms to 30sec
Signal to noise: 550:1
Dynamic range: 50,000
Read noise: 6 e- RMS
Cooling: +15°C (@ room temp)
Cooling stability: ± 0.1°C
Cooling controls: on/off/lock
Interface: USB 2.0 typ B female
Software: DASH (see left)

Case Studies
Knowledge Base

Tech Note: choosing the excitation wavelength & minimising fluorescence in Raman spectroscopy

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