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

Products
Lasers
Laser Application Systems
Laser Measurement & Safety
Laser Marking
Spectrum Analysis
Laboratory Instruments
Fiber-Coupled LEDs
Optics & Coatings
Components & Accessories
Customized Products
 
Spectrum Analysis
Fiber Optic Spectrometer
Raman Spectrometer
Fluorescence Spectrometer
LIBS
A/T Spectrum Detection System
CRDS Detection System
TRS Detection System
Probe
Laser Sources
Components & Accessories

 

Customer Service

TTL or Analog Modulation

Fiber Coupling

Coating Service
Laser Marking Service
Complete Solution
 
Contact CNI
Tel: +86-431-85603799 / 89216078
Fax:    +86-431-87020258
E-mail:  sales@cnilaser.com
国内: 0431-87020257 / 89216068
 
Optical Cavity Ring-down Spectroscopy Detection System
 
Optical cavity ring-down spectroscopy technology is an emerging method of spectrum detection. This technology is especially suitable for substance weak absorption with its characteristics of long absorption optical path and unaffected by the light intensity fluctuation. It is applied to the accurate measurement of high reflectivity of lens (accuracy up to 10-4 ~10-6) and trace gas detection with features of simple device and easy quantitative measurement.

In CNI Optical Cavity Ring-down Spectroscopy Detection System, as follow figure shows, pulsed laser as a laser source, optical resonant cavity composed of high reflectivity lens M1 and M2, the laser pulse is reflected back and forth between the two mirrors to from oscillation when pulsed laser along with the optical axis injected into the cavity. Laser pulse ring-down process and time is detected and recorded by the photodetector behind M2. Then the cavity gas concentration can be calculated In the condition of known cavity mirror reflectivity.
 

cavity ring-down spectroscopy

Specifications
 
Short pulse laser Pulse duration: 5-20ns, repetition rate:<10KHz, output power: 0-100mW.
High speed photodetector Si substrate photodetector, rise time: 1ns, spectral response range: 400-1100nm
Ring-down cavity Cavity length: 600mm (customized), cavity mirror reflectivity>99.92%@ center wavelength
Others Oscilloscope, air chamber
Detection Signal
 

600mm straight ring-down spectroscopy

600mm straight ring-down spectroscopy

 
Application case
 
   Beijing Jiaotong University School of Science uses CNI optical ring-down spectrum detection system for visibility detection experiments.
 
 

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

Tel:+86-431-85603799     Fax:+86-431-87020258     E-mail: sales@cnilaser.com

 
在线客服
在线客服系统