ATR20201 785nm narrow line laser is characteristic by its highreliability and ultra-narrow linewidth. ATR20201 operates with a single 5V power supply and can output 500 mW laser power.When ATR20201 is used in Ramanspectrometer, it will help to obtain high spectral stability and highresolution. It can be controlled through the TTL interface by the offered pinout definition and the communication protocol. The output laser power canbe changed continuously by changing the LD working current with the commands.
lMaxoutput power: 500 mW
lCenterwavelength: 785±0.5 nm
lLinewidth (FWHM): < 0.1 nm
Multimode fiber coupled
Power stability in 2h
Power stability while open laser
105/125um multimode fiber 0.22NA
LD working current
TEC (˚C) (±5)
Current (Laser on)
2 .5 A
Current (Laser off)
Figure3 the relationship between output laser power and the operationcurrent
1 Reliabilityand Stability
Figure 4showing thestability times while open laser. The typical stabilization time is 5 seconds. Thisparameter affects the application directly in rapid detection.
Figure 5 showing the long term power stabilitytesting result of 5 samples, it indicated that the laser has a good stabilityin continuous work.
Figure 4 Power stabilitytesting results of 5 samples
Figure 5 Long term stabilitytesting results of 5 samples
1 Application for Raman Spectrometer