Changchun New Industries Optoelectronics Technology Co., Ltd.
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Contact CNI
Tel: +86-431-85603799 / 89216078
Fax:    +86-431-87020258

国内: 0431-87020257 / 89216068


Longitudinal Mode Measurement——F-P Scanning Interferometer

     Laser longitudinal mode refers to the axial distribution of the light field along to its direction of propagation. An ordinary laser usually has a few or dozens of longitudinal modes. Using high resolution spectrometer to test the laser spectrum, there will be multiple laser frequencies (or wavelengths). If restraining most of the longitudinal modes through selecting frequencies and just retaining one of them, then we could get single longitudinal mode (single frequency) laser.
     Single longitudinal laser compares with ordinary laser, has narrower line width and coherence length. It is widely used in spectrum analysis, holographic imaging, interferometry and other fields.

Testing Instrument: F-P Scanning Interferometer

F-P Scanning Interferometer
Model FPSI
Applicable wavelength 473nm,532nm,1064nm, etc.
Free spectrum range 75GHz (Adjustable)
Finess 100

Examples of Testing Results

Single longitudinal mode testing Multiple longitudinal modes testing

Single longitudinal mode testing

Multiple longitudinal modes testing



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

International Tel: +86-431-85603799  Domestic Tel:  0431-87020257  Fax:+86-431-87020258