Changchun New Industries Optoelectronics Technology Co., Ltd.
Lasers, Optics & Photonics

Spectrum Analyzers
Laser Application Systems
Laser Measurement Tools
Laser Marking
Fiber-Coupled Lasers & LEDs
Optics & Coatings
Laboratory Instruments
Components & Accessories
Laser Measurement & Safety
Power & Stability Measurement
Wavelength Measurement
Pulse Measurement
Longitudinal Mode Measurement
Coherence Length Measurement
Noise Measurement
Polarization State Measurement
Infrared Laser Display Card
Laser Goggles
Customer Service
TTL or Analog Modulation
Fiber Coupling
Coating Service
Laser Marking Service
Customized Products
Contact CNI
Tel: +86-431-85603799 / 89216078
Fax:    +86-431-89216068

国内: 0431-87020257 / 89216068


Coherence Length Measurement——Michelson Interferometer

      Coherence length is an important parameter of measuring the temporal coherence of an laser. The measuring method is to split the laser beam in two-way lights. When the two light beams recombine, they interfere and form interference fringes in the focal plane. Coherence length is defined as the optical path difference of the two-way lights when the interference fringes contrast >50%.

Testing Instrument: Michelson Interferometer

Michelson Interferometer
Wavelength range 200-1100nm;
other wavelengths are available
Test precision 1mm
 Maximum test length 2m;50m;
other lengths are available

Example of Testing Results

 Interference fringes
 Interference fringes


Addr: No.888 Jinhu Road High-tech Zone,Changchun 130103, P.R.China 

International Tel: +86-431-85603799  Domestic Tel:  0431-87020257  Fax:+86-431-89216068