Compact Motorized Laser Power Attenuator

Order

SKU	Description · Note
990-0075-1030M	for operation at 1020-1040 nm, LIDT 10 J/cm², 10 ns, 50 Hz @ 1030 nm·Accessories	Out of stock $1,638
990-0075-1064M	for operation at 1064 nm, LIDT 10 J/cm², 10 ns, 50 Hz @ 1064 nm·Accessories	2 in stock Ships in: 2–5 calendar days $1,638
990-0075-257M	for operation at 257 nm, LIDT 2 J/cm², 10 ns, 50 Hz @ 257 nm·Accessories	Out of stock $1,788
990-0075-266M	for operation at 266 nm, LIDT 2 J/cm², 10 ns, 50 Hz @ 266 nm·Accessories	14 in stock Ships in: 2–5 calendar days $1,788
990-0075-343M	for operation at 343 nm, LIDT 3 J/cm², 10 ns, 50 Hz @ 343 nm·Accessories	1 in stock Ships in: 2–5 calendar days $1,788
990-0075-355M	for operation at 355 nm, LIDT 3 J/cm², 10 ns, 50 Hz @ 355 nm·Accessories	7 in stock Ships in: 2–5 calendar days $1,788
990-0075-400M	for operation at 390-410 nm, LIDT 3 J/cm², 10 ns, 50 Hz @ 400 nm	Out of stock $1,638
990-0075-515M	for operation at 510-520 nm, LIDT 5 J/cm², 10 ns, 50 Hz @ 515 nm·Accessories	Out of stock $1,638
990-0075-532M	for operation at 532 nm, LIDT 5 J/cm², 10 ns, 50 Hz @ 532 nm·Accessories	9 in stock Ships in: 2–5 calendar days $1,638
990-0075-800M	for operation at 780-820 nm, LIDT 8 J/cm², 10 ns, 50 Hz @ 800 nm	Out of stock $1,788
990-0075ABD	Attachable Beam Dump <6W with coated protective window	Out of stock $191
990-0075C1	RS232 Cable, 1.8 m	2 in stock Ships in: 2–5 calendar days $18
990-0075C10	RS232 Cable, 10 m	Out of stock $35
990-0075C15	RS232 Cable, 15 m	Out of stock $41
990-0075C5	RS232 Cable, 5 m	3 in stock Ships in: 2–5 calendar days $24
990-0075RA	DIN35 Rail Adapter	Out of stock $27
990-0075SBD	Separated Beam Dump <15W	Out of stock $202

Specifications

OPTICAL SPECIFICATIONS

Clear input aperture	ø18 mm
Clear output aperture	ø18 mm
Power attenuation range	<0.1 % to >98 %
LIDT coating	>10 J / cm2, 10 ns @ 1064 nm
Close to open time	< 0.2 sec
Resolution	175,542 µsteps in full rotation (0.002 deg, 7.2 arcsec, 0.035 mrad)
Accuracy / (repeatability after 10,000 positions without homing)	±10 µsteps / (±0.02 deg, less than ±0.035 %)
Motor	2 phase stepper motor, 200 steps with 256 µstepping

MECHANICAL SPECIFICATIONS

	Attenuator	Attenuator with beam dump	Controller
Length	76 mm	76 mm	125 mm
Width	36 mm	52 mm	53 mm
Height	58 mm	58 mm	31 mm

OPERATING CONDITIONS

Operating temperature	10 °C to 40 °C
Storage temperature	-15 °C to 50 °C

Description

990-0075 series laser power attenuator is a compact motorized device for laser power control of linearly polarized beam. Its operation principle consists of changing laser beam polarization by rotation of zero-order half-waveplate and then passing the beam through a fixed Brewster type thin film polarizer which transmits p-polarized and reflects s-polarized laser beam. The intensity ratio of s- and p- polarized beams can be continuously varied without alteration of other beam parameters by motorized rotation of the waveplate. The attenuation level is controlled by the software in 0.1 - 97% range.

The device combines unique mechanical design which ensures repeatability and high stability of performance. All optical components of the attenuator have high LIDT coatings (>10 J/cm² at 10 ns, 1064 nm) and provide stable and reliable performance even using device with high power lasers in industrial applications.

Standard compact motorized attenuators are designed for operation at the most common laser wavelengths: 1064 nm, 1020-1040 nm, 780-820 nm, 532 nm, 510-520 nm, 390-410 nm, 355 nm and 343 nm. Custom attenuators can be designed for other laser wavelengths.

A secondary laser beam with s-polarization can be rejected from the laser power attenuator unit to an external beam dump or utilized for the particular application. A standard compact external beam dump is optionally offered with this attenuator and is suitable for lasers with average power up to 6 W. This beam dump stops secondary s-polarized beam in the attenuator and allows to avoid any thermal effects or stress in the housing of the device.

Standard kit includes: