A low-priced alternative for accurate laser wavelength measurement.
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.
CW lasers, 400 – 1700 nm, low-priced alternative
The 521 Series Laser Wavelength Meter is for scientists and engineers who need to know the absolute wavelength of their CW laser, but do not need to know it to the highest accuracy available. The model 521 is a unique system that couples accurate wavelength measurement and affordability in a compact instrument.
Proven interferometer technology
The 521 Laser Wavelength Meter measures absolute wavelength of CW and quasi-CW lasers to an accuracy of ± 10 parts per million (± 0.01 nm at 1000 nm). This system uses Michelson interferometer-based technology that is similar to that used by the Bristol Instruments’ model 671, the most precise laser wavelength meter available. The primary difference is that a Moiré scale is used as its built-in reference. This high-resolution scale provides the continuous calibration that is necessary to guarantee the accuracy of the wavelength measurement. For even greater confidence, the Moiré scale can be calibrated periodically using a simple procedure with any red HeNe laser input.
Broad wavelength coverage
Two versions of the 521 Laser Wavelength Meter are available to satisfy the needs of most experiments. The 521-VIS operates over the wavelength range of 400 to 1100 nm, and the 521-NIR has an operational wavelength range of 520 to 1700 nm.
The 521 Laser Wavelength Meter operates with a PC, running under Windows, via a high-speed USB 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. Th21e laser under test enters the 521 system through a pre-aligned fiber-optic input connector to ensure optimum alignment. For free-beam lasers, the LC-1 Fiber-Optic Input Coupler is offered as a simple way to launch into fiber.
CW and quasi-CW (repetition rate >10 MHz)
400 – 1100 nm
520 – 1700 nm
± 10 ppm
± 5 ppm
Continuous with built-in Moiré scale
10 µW (400 nm)
100 µW (520 nm)
Pre-aligned FC/UPC fiber-optic connector (9 μm core diameter)
USB interface with Windows-based display program