871 Series Pulsed & CW Laser Wavelength Meter

871 Series Pulsed & CW Laser Wavelength Meter

Wavelength accuracy as high as ± 0.0001 nm
Automatic calibration with built-in wavelength standard
Operation available from 375 nm to 2.5 μm
Sustained measurement rate of 1 kHz
Convenient pre-aligned fibre optic input
Straightforward operation with PC using
USB or Ethernet
Display software provided to control measurement parameters and report wavelength data
Built-in PID controller for precise laser stabilisation
Automatic data reporting using custom or LabVIEW programming eliminates the need for a dedicated PC
Convenient tablet/smartphone application reports measurement data anywhere in the laboratory
Includes 5 year warranty

High wavelength accuracy
The 871 Laser Wavelength Meter uses a proven Fizeau etalon design to measure the wavelength of pulsed and CW lasers to an accuracy as high as ± 0.2 parts per million (± 0.0002 nm at 1000 nm). Automatic calibration with a built-in wavelength standard guarantees this performance to ensure the most meaningful experimental results.

Fastest sustained measurement rate
The 871 Laser Wavelength Meter generates a spatial interferogram that is detected by a fast photodetector array. An on-board digital signal processor quickly converts the interferometric information to wavelength. Because this calculation is done internally, a sustained measurement rate as high as 1 kHz is achieved.

Wavelength measurements can be reported at this rate by data streaming with an RS-422 serial interface, or an internal data buffer is available to save up to one million measurements.

Convenient laser input and straightforward operation
A laser under test enters the 871 Laser Wavelength Meter through a pre-aligned fibre optic input connector. This ensures optimum alignment of the laser beam to the system’s Fizeau etalons resulting in uncompromised accuracy.

The 871 Laser Wavelength Meter operates with a PC connected directly by USB or though a local area network via Ethernet. Software is provided to control measurement parameters and to report wavelength data, or the system can be integrated directly into an experiment using a library of commands for custom or LabVIEW programming. In addition, a browser-based application can be used with a tablet or smartphone to display laser wavelength information anywhere in the laboratory.

Specifications
Model	871A	871B
Laser Type	Pulsed and CW
Wavelength
Range	VIS: 375 – 1100 nm NIR: 630 – 1700 nm	VIS: 375 – 1100 nm NIR: 630 – 1700 nm NIR2: 1000 – 2500 nm
Accuracy ^[1], ^[2], ^[3]	± 0.2 ppm (single-mode fibre) ± 0.0002 nm @ 1000 nm ± 60 MHz @ 300,000 GHz	± 0.75 ppm (single-mode fibre) ± 0.0008 nm @ 1000 nm ± 225 MHz @ 300,000 GHz± 1 ppm (multi-mode graded-index fibre ≤ 62.5 μm diameter) ± 0.001 nm @ 1000 nm ± 300 MHz @ 300,000 GHz
Repeatability ^[4], ^[5]	± 0.0075 ppm ± 0.0075 pm @ 1000 nm ± 2.25 MHz @ 300,000 GHz	± 0.0125 ppm ± 0.0125 pm @ 1000 nm ± 3.75 MHz @ 300,000 GHz
Calibration ^[6]	Automatic with built-in wavelength standard
Display Resolution	9 digits	8 digits
Units ^[7]	nm, μm, cm-1, GHz, THz
Optical Input Signal
Maximum Bandwidth (FWHM)	1 GHz	10 GHz
Minimum Input ^[8], ^[9], ^[10], ^[11]	VIS: 3 – 300 nJ NIR: 50 – 600 nJ	VIS: 3 – 300 nJ NIR: 30 – 600 nJ NIR2: 50 – 600 nJ
Measurement Rate	1 kHz
Inputs/Outputs
Optical Input ^[12], ^[13]	Pre-aligned FC/PC fibre connector (optional free beam-to-fibre coupler)
Instrument Interface	USB and Ethernet interface with Windows-based display program, and browser-based display application Streaming via RS-422 (internal or external TTL trigger) Internal data storage for up to 1 million measurements Library of commands (SCPI) for custom and LabVIEW programming using any PC operating system PID controller (± 5 V output)
Computer Requirements ^[14]	PC running Windows 10, 1 GB available RAM, USB 2.0 (or later) port, monitor, pointing device
Environmental ^[8]
Warm-Up Time	< 15 minutes
Temperature	+15°C to +30°C (-10°C to +70°C storage)
Pressure	500 – 900 mm Hg
Humidity	≤ 90% R.H. at + 40°C (no condensation)
Dimensions and Weight
Dimensions (H x W x D)	89 mm x 432 mm x 381 mm
Weight	7.65 kg
Power Requirements	90 – 264 VAC, 47 – 63 Hz, 50 VA max
Warranty	5 Years (parts and labour)

^[1] Defined as measurement uncertainty, or maximum wavelength error, with a confidence level of ≥ 99.7%.
^[2] Traceable to accepted physical standards.
^[3] Single-mode input fibre must have single-mode performance at the wavelength of the laser under test.
^[4] Standard deviation for a 1 minute measurement period after the instrument has reached thermal equilibrium. Standard deviation for a 10 minute period is about
twice the 1 minute specification.
^[5] Wavelength resolution is approximately two times repeatability.
^[6] For VIS version, stabilised single-frequency HeNe laser. For NIR and NIR2 versions, laser diode locked to acetylene absorption (NIST Special Publication 260-133).
^[7] Data in units of nm, μm, and cm^-1 are given as vacuum values.
^[8] Characteristic performance, but non-warranted.
^[9] Required minimum energy from a single laser pulse. Greater sensitivity is achieved by increasing the length of the measurement window to allow for
the integration of a greater number of laser pulses.
^[10] Required minimum power is approximated by multiplying the required minimum energy by the selected measurement rate.
^[11] Sensitivity at specific wavelengths can be determined from graphs that are provided in the 871 Series Product Details brochure.
^[12] Visual inspection and optimisation of the interference fringe pattern is not required.
^[13] An FC/PC terminated input fibre is required. System will not operate with FC/APC terminated fibre.
^[14] For use with Windows-based display program. Interfacing via SCPI can be done using any PC operating system.

871 Series Pulsed & CW Laser Wavelength Meter Datasheet
871 Series Pulsed & CW Laser Wavelength Meter Brochure