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Bristol Instruments 871 Series Pulsed Laser Wavelength Meter

The fastest and most reliable method to measure the wavelength of pulsed and CW lasers.

Bristol Instruments’ wavelength meters are for scientists and engineers who need to know the exact wavelength of their lasers. These systems use proven interferometer-based technology to measure absolute wavelength to an accuracy as high as ± 0.0001 nm. To achieve the reliable accuracy that is expected from Bristol Instruments, all of its wavelength meters include a built-in wavelength standard for continuous calibration. Systems are available for CW and pulsed lasers that operate at wavelengths from 350 nm to 12 µm.

Bristol Instruments 871 Series Pulsed Laser Wavelength Meter

 

Pulsed and CW lasers, 350 – 1700 nm, 1 kHz measurement rate

The 871 Series Pulsed Laser Wavelength Meter provides accurate wavelength information for researchers who need to know the exact wavelength of their CW or pulsed lasers. A unique Fizeau interferometer-based design measures absolute wavelength to an accuracy of ± 1 part per million. This design also enables a sustained measurement rate as high as 1 kHz, the fastest available.

  • » Operates with both pulsed and CW lasers
  • » Absolute wavelength measured to an accuracy as high as ± 175 MHz
  • » Automatic calibration with a built-in wavelength standard
  • » Wavelength range options available from 350 to 1700 nm
  • » Measurement rate as high as 1 kHz
  • » Asynchronous operation with automatic pulse detection
  • » Input energy required as low as 1 µJ
  • » Displays wavelength, wavenumber, or frequency
  • » Pre-aligned fiber-optic input
  • » Straightforward operation with PC using high-speed USB or Ethernet interfaces
  • » Web-based application available for tablet or smart phone display
  • » Easy to integrate into experiement for automatic wavelength reporting and control
  • »  Includes software for custom or LabVIEW programming

 

Accurate wavelength measurement of pulsed and CW lasers
The 871 Pulsed Laser Wavelength Meter measures the absolute wavelength of pulsed and CW lasers to an accuracy of ± 1 part per million (± 300 MHz at 1000 nm). This performance is maintained over long periods of time because the system is automatically calibrated with a built-in wavelength standard. The calibration process takes less than two seconds, and can be set to activate automatically at a chosen time interval, or based on the system’s internal thermal conditions.


Fastest wavelength measurement available

The 871 Pulsed Laser Wavelength Meter uses a unique Fizeau etalon design to generate a spatial interferogram that is detected by a fast photodetector array. Using an on-board digital signal processor, the interferometric data is processed quickly into an accurate wavelength measurement. The combination of these technologies provides an unmatched, sustained measurement rate as high as 1 kHz. The wavelength of every pulse is measured for lasers operating at repetition rates of up to 1 kHz. At higher repetition rates, the system integrates all pulses arriving within a 1 ms window, or an external trigger can capture individual pulses.


Broad wavelength coverage and straightforward operation

The 871 Pulsed Laser Wavelength Meter is available in two broad wavelength configurations to satisfy most experimental requirements. These ranges are the VIS (350 – 1100 nm) and NIR (650 – 1700 nm). A pre-aligned fiber-optic input ensures optimum alignment resulting in uncompromised accuracy. The system operates with a PC running under Windows, via a USB or Ethernet interface. Software is provided to control measurement parameters and to report data, or the system can become part of an experiment using a library of commands for custom or LabVIEW programming.

MODEL

871B-VIS

871B-NIR

LASER TYPE

Pulsed and CW

WAVELENGTH RANGE

350 – 1100 nm

650 – 1700 nm

WAVELENGTH ACCURACY

± 1 ppm

MEASUREMENT REPEATABILITY

± 0.1 ppm

CALIBRATION

Automatic with built-in wavelength standard

MINIMUM INPUT

15 µJ (350 nm)
1 µJ (700 nm)
100 µJ (1100 nm)

15 µJ (630 nm)
1 µJ (1500 nm)
100 µJ (1700 nm)

MEASUREMENT RATE

400 Hz

1 kHz

OPTICAL INPUT

Pre-aligned FC/UPC connector (graded-index fiber with ≤ 62.5 µm core diameter)

INSTRUMENT INTERFACE

High-speed USB and Ethernet interface with Windows-based display program
Web-based display application
SCPI commands for custom and LabVIEW programming