Optical Wavelength Meters are used to measure high-accuracy wavelength for pulsed and continuous-wave optical laser signals, and Optical Wavelength Meters provide high-accuracy monitoring of tunable lasers and diode lasers. Wavelength meters are useful for applications in which high accuracy in wavelength is required, such as laser applications.

The demand for broadband and the move to 100Gb/s transmissions is increasing the need for accurate wavelength measurements. To meet the growing demand for access to larger volumes of digital information, telecommunications operators increase system capacity using dense wavelength division multiplexing (DWDM). Both active DWDM components such as transmission lasers, and passive components such as multiplexers, demultiplexers and add/drop filters, thin film filters and fiber gratings, must be accurately characterized with respect to absolute wavelength.

Wavelength meters provide accurate information for scientists and engineers who need to know the exact wavelength of their lasers. These systems use proven Michelson or Fizeau interferometer-based technology to measure absolute wavelength to a guaranteed accuracy as high as ±0.0001 nm.

Wavelength Meter is Superior to Spectrometer

A variety of techniques have been devised to determine the wavelength of lasers. Although there are many ways to measure optical wavelength, wavelength meters provide very high-accuracy compared to that of a spectrometer or grating monochromator, which provide optical wavelength measurements to accuracies around a tenth of a nanometer. Wavelength meters can provide accuracy as high as ±0.0001 nm., and they can monitor the wavelength of tunable lasers or lasers subject to wavelength drift, without the use of cumbersome, time-consuming long-path techniques that a spectrometer would require.

Tunable laser applications, such as cooling/trapping and differential-absorption LIDAR, also require wavelength meters, as does testing and manufacturing of dense wavelength-division-multiplexing (DWDM) equipment for optical communications.

Features and Benefits of Optical Wavelength Meter

  • High Wavelength Accuracy
  • High Wavelength Repeatability
  • High Dynamic Range
  • Low Temperature Sensitivity
  • High Reliability and Repeatability
  • Built-in Wavelength Reference

Typical Applications of Optical Wavelength Meters

  • Optical Performance Monitoring of dense wavelength division multiplexing (DWDM) System
  • Multi-Wavelength Monitoring for Wavelength Locking
  • Portable optical spectrum analyzers (OSA) or Spectrometers
  • Fiber Bragg Grating Sensor Analyzer

Recent News on Optical Wavelength Meters:

Optical Wavelength Meter from YokogawaYokogawa has stepped up to release its AQ6150 series of Optical Wavelength Meters. The new meters are designed to complement the company’s optical spectrum analyzers. Right now, the series includes two models. The AQ6151 is designed for high accuracy and features an accuracy spec of +/-0.3pm. The standard accuracy model, AQ6150, offers +/-1pm accuracy. Both units feature a wavelength range of 1270 to 1650nm. The units employ a Michelson interferometer and a high-speed FFT2 algorithm, which make it possible to measure a multiple-wavelength optical signal. Built-in measurement and analysis functions include drift analysis, average measurement, and Fabry-Perot laser analysis.