Accuracy. Reliability. Confidence.

LASER WAVELENGTH METER

872 Series

Key Features:• Measurement resolution as fineas 200 kHz.
• Wavelength accuracy up to ± 0.0001 nm.

High-Resolution Wavelength Measurement• Automatic calibration with a built-in
wavelength standard.

The 872 Series Laser Wavelength Meter from Bristol Instrumentsbuilds upon our unique Fizeau etalon technology to offer very highmeasurement resolution. This results in exceptional sensitivity towavelength deviations making the 872 system ideal for thefrequency stabilization of lasers.

• Operation available from 375 to 1700 nm.

Two versions of the 872 Laser Wavelength Meter are available.
The model 872A-VIS operates over the range of 375 to 1100 nm,
and the model 872A-NIR works from 630 to 1700 nm. Theseinstruments both provide wavelength accuracy of ± 0.2 parts permillion (± 60 MHz at 1000 nm) and frequency resolution of 1.0 partper billion (300 kHz at 1000 nm). Automatic calibration with a built-in
wavelength standard guarantees this performance to ensure the mostmeaningful experimental results.

• Optional Fiber-Optic Switch accessory
enables the characterization of up to 8
lasers with a single instrument.

• Sustained measurement rate of 1 kHz.
• Convenient pre-aligned fiber-optic input.
• Built-in PID controller for precise laserstabilization.

• Five-year warranty covers all partsand labor.

Model 872A-NIR wavelength measurement results for a 1532 nm acetylene-locked laser over a 30-minute time period.
Standard Deviation is 191 kHz.

It's our business to be exact!

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SPECIFICATIONS

872 Series

MODEL872A

LASER TYPE

Pulsed and CWWAVELENGTH
Range

VIS: 375 - 1100 nmNIR: 630 - 1700 nm

Accuracy 1, 2, 3± 0.2 ppm (single-mode fiber)± 0.0002 nm @ 1000 nm± 60 MHz @ 300,000 GHz

Measurement Resolution 3, 40.001 ppm (1.0 ppb)
0.001 pm @ 1000 nm
300 kHz @ 300,000 GHz

Calibration 5

Automatic with built-in wavelength standard

Display ResolutionUnits

9 digits

6nm, μm, cm-1, GHz, THz

OPTICAL INPUT SIGNAL
Maximum Bandwidth (FWHM)

1 GHz

Minimum Input 7, 8, 9, 10

VIS: 3 - 300 nJ
NIR: 50 - 600 nJ

Maximum Input

CW: 10 mW

MEASUREMENT RATE

Pulsed: 0.5 mJ (10 ns duration)
1 kHz

INPUTS/OUTPUTS
Optical Input 11, 12

Pre-aligned FC/PC fiber connector (optional free beam-to-fiber 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 13
ENVIRONMENTAL

PC running Windows 10, 1 GB available RAM, USB 2.0 (or later) port, monitor, pointing device

7Warm-Up Time

< 15 minutes

Temperature | Pressure | Humidity+15°C to +30°C (-10°C to +70°C storage) | 500 – 900 mm Hg | ≤ 90% R.H. at + 40°C (no condensation)

DIMENSIONS AND WEIGHT
Dimensions (H x W x D)

3.5" x 17.0" x 15.0" (89 mm x 432 mm x 381 mm)
Includes mounting hardware for 19-inch racks

Weight17 lbs (7.65 kg)

POWER REQUIREMENTS

90 - 264 VAC, 47 - 63 Hz, 50 VA max

WARRANTY

5 Years (parts and labor)

(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)

Defined as measurement uncertainty, or maximum wavelength error, with a confidence level of ≥ 99.7%.
Traceable to accepted physical standards.
Single-mode input fiber must have single-mode performance at the wavelength of the laser under test.
Standard deviation.
For VIS version, stabilized single-frequency HeNe laser. For NIR version, laser diode locked to acetylene absorption (NIST Special Publication 260-133).
Data in units of nm, μm, and cm-1 are given as vacuum values.
Characteristic performance, but non-warranted.
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.
(9) Required minimum power is approximated by multiplying the required minimum energy by the selected measurement rate.
(10) Sensitivity at specific wavelengths can be determined from graphs that are provided in the 871 Series Product Details brochure.
(11) Visual inspection and optimization of the interference fringe pattern is not required.
(12) An FC/PC terminated input fiber is required. System will not operate with FC/APC terminated fiber.
(13) For use with Windows-based display program. Interfacing via SCPI can be done using any PC operating system.

Bristol Instruments reserves the right to change the specifications as may be required to permit improvements in the design of its products.
Specifications are subject to change without notice.

BRISTOL INSTRUMENTS, INC.

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e: info@bristol-inst.com

REV 01-24