Conoptics Laser Stabilization System (LASS-II) is designed as an electro-optic feedback loop capable of reducing the amplitude variations commonly associated with lasers. The LASS-II system enhances the signal to noise ratio of the laser over a broad bandwidth. Both an internal and external reference input is provided, allowing analog programming of the laser throughput.
The LASS-II is particularly convenient for use in recording systems where laser power must be varied as a function of position on the recording medium (i.e. video disc, flat bed recorders, etc.). The system is composed of feedback electronics, power supply and electro-optic modulator with integrated beam-splitter and photodiode amplifier.
Performance Characteristics
Wavelength |
514nm, laser power 50mw, lo= .5 lmax |
Laser Power |
50mw, low = .5lmax |
Beam Diameter |
1.4mm (1/e 2) TEMOO |
Noise Reduction (Int. Ref Mode) |
1/1@500kHz, 5/1@100kHz, 18/1@50kHz, 100/1@10hHz, 200/1@1kHz, 250/1@200hz |
Noise Floor |
458nm, -100db Relative to F.S. |
D.C. Stability – Short Term |
.1% Relative to Full Scale (@.5Imax, T=0 -> 1hr. |
External Input Impedance |
1k nominal |
External Input Voltage |
0 -> +1 V Max |
Electrical Input Power |
-20W (100-230 Vac) |
The amount of light for calibrationOutput of beam-splitter to diode |
@633nm 300uw@514nm 450uw@488nm 540uw@458nm 820uw*Two different types of beam splitters are available to optimize efficiency and finesse |
Static Transmission |
85% (excluding beam-splitter) |
Useable Aperture |
2.5mm square * |
Optical Bandwidth |
400-900nm |
Max. Throughput Power |
3.5w/mm2 TEMOO |
System Options
Standard System (532nm) |
LASS-II with Model 370 E-O Modulator |
Large Aperture (532nm) |
LASS-II with Model 370LA E-O Modulator |
532nm-to-1064nm fsec laser |
LASS-II with Model 350-105 E-O Modulator |
800nm-to-2000nm psec laser |
LASS-II with Model 360-80 E-O Modulator |
Rack Mount |
RM Option |
UV and DUV Options |
325nm-to-515nm, 257/266nm |
Additional Information

LASS II Spec Sheet