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Thorlabs.com - Noise Eaters / Laser Amplitude Stabilizers
Item # LCC3111H was discontinued on July 7, 2016. For informational purposes, this is a copy of the
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Laser Amplitude Stabilizer / Variable Attenuator
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Models with Wavelength Ranges Covering 425 - 1620 nm Available
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Closed-Loop Feedback System
LCC3111H
Front
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O V E R V I E W
Features
Reduces Laser Intensity Noise
Also Functions as a Variable Attenuator or EO Modulator
Models for use at 425 - 650 nm, 475 - 650 nm, 650 - 1050 nm, or 1050 - 1620 nm
Maximum Input Power of up to 1 W, Depending on Model, Wavelength, and Beam Size
(See the Operation Tab for Details)
Excellent for Sensitive Experiments such as Optical Tweezers
Ideal for Stabilizing CW Pump Lasers
Thorlabs' Liquid Crystal Noise Eaters / Laser Amplitude Stabilizers are precision instruments for
stabilizing, modulating, and attenuating the power of linearly polarized light. These closed-loop systems are
designed for use with light in the 425 - 650 nm (LCC3111L), 475 - 650 nm (LCC3111H), 650 - 1050 nm
(LCC3112H), or 1050 - 1620 nm (LCC3113H) wavelength range. We offer noise eater models for low
(<100 mW) or high (<1 W) power use, all with external modulation inputs. See the Specs tab for details.
Noise Reduction
Utilizing a liquid crystal amplitude modulator, combined with a photodiode for power measurement and a
feedback control circuit, the noise eaters can eliminate intensity noise in linearly polarized light, achieving
amplitude stabilization of within 0.05% of a selected output power. The input power can be set to one of
several ranges using the switch(es) on the top of the unit. The potentiometer is then adjusted to select the
output power (see the Operation tab for more information). Long-term performance and frequency characterization for each noise eater model are shown on
the Performance tab.
https://www.thorlabs.com/newgrouppage9_pf.cfm?guide=10&category_id=95&objectgroup_id=6107[7/7/2016 8:29:39 AM]
LCC3111H - July 7, 2016
website content at that time and is valid only for the stated product.
N O I S E E A T E R S / L A S E R A M P L I T U D E S T A B I L I Z E R S
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Application Idea
LCC3111H
Noise Eater with
Half-Wave Plate in
CRM1 Rotation Mount
Click to Enlarge
Noise Attenuation Factor is the Ratio of Noise
Amplitude Before and After the Noise Eater
Click for Details
LCC3113H Top View Showing Power Range
Adjustment Switches and Modulation Input
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Related Manuals for THORLABS LCC3111H
Summary of Contents for THORLABS LCC3111H
- Page 1 These closed-loop systems are designed for use with light in the 425 - 650 nm (LCC3111L), 475 - 650 nm (LCC3111H), 650 - 1050 nm (LCC3112H), or 1050 - 1620 nm (LCC3113H) wavelength range. We offer noise eater models for low (<100 mW) or high (<1 W) power use, all with external modulation inputs.
- Page 2 Thorlabs’ Noise Eaters are post mountable in two orientations via 8-32 (M4) tapped holes. They also feature 4-40 tapped holes on the front and back for 30 mm Cage System compatibility and an SM1-threaded (1.035"-40) rear aperture for Ø1" Lens Tube compatibility.
- Page 3 Thorlabs.com - Noise Eaters / Laser Amplitude Stabilizers Angle of Incidence ±2° (Max) Input Polarization Tolerance ±3° ≤λ/4 at 635 nm ≤λ/2 at 635 nm ≤λ/2 at 635 nm Wavefront Distortion <0.5% from 650 - <0.5% from 1050 - <0.5% from 400 - 650 nm...
- Page 4 Input Power vs. Noise Amplitude vs. Signal Attenuation Performance Noise Attenuation Transmission LCC3111L(/M) LCC3111H: High Power Noise Eater for Visible (475 - 650 nm) Click here to download raw data. Noise Attenuation Modulation Long-Term Item # vs. Input Power vs.
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Page 5: Mounting And Alignment
Thorlabs.com - Noise Eaters / Laser Amplitude Stabilizers Thorlabs’ Liquid Crystal Noise Eater is a precision instrument for stabilizing, attenuating, and modulating laser power. The noise eater Click to Enlarge consists of a variable attenuator (liquid crystal wave plate and polarizer), a calibrated beamsplitter, and a servo controller to control the modulator, as depicted in the block diagram to the right. - Page 6 For the high power noise eaters (LCC3111H, LCC3112H, and LCC3113H), this damage threshold is 8 W/cm , which corresponds to a maximum input power of 1 W if the input power is distributed evenly across the Ø4 mm clear aperture.
- Page 7 Noise Eaters for 425 - 650 nm or 475 - 650 nm LCC3111L is a Low-Power Noise Eater (0.5 mW to 60 mW) with a Modulation Input LCC3111H is a High-Power Noise Eater (30 mW to 1000 mW) with a Modulation Input Part Number...
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