|
Laser Stabilization
System (ST-LASS-II) is designed as an electro-optic feedback loop capable of
reducing the amplitude variations commonly associated with lasers. The
ST-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 ST-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.
Specifications:
Performance
Characteristics
|
|
Wavelength
|
514nm,
laser power 50mw, lo= .5 lmax
|
Laser power
|
50mw, low =
.5lmax
|
Beam
diameter
|
1.4mm (1/e
2) TEM00
|
Noise
reduction
|
1/1@ 500kHz
(Int. Ref. Mode)
5/1 @
100kHz
18/1 @50kHz
100/1
@10kHz
200/1 @1kHz
250/1
@200hz |
Noise floor
|
458nm,
-100db Relative to F.S.
|
DC
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 calibration output 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
|
2.5mm2
|
Optical
bandwidth
|
400-900nm
|
Max
throughput power
|
3.5w/mm2
TEM00
|
System
options
|
|
Standard
system (532nm)
|
ST-LASS-II
with Model 370 E-O Modulator
|
Large
aperture (532nm)
|
ST-LASS-II
with Model 370LA E-O Modulator
|
532nm-1064nm fs laser
|
ST-LASS-II
with Model 350-105 E-O Modulator
|
800nm-2000nm ps laser
|
ST-LASS-II
with Model 360-80 E-O Modulator
|
Rack mount
|
RM Option
|
UV & DUV
options
|
325nm-to-515nm, 257/266nm
|
EO Modulator
EO Pulse Picker
EO Deflector |
