User Guide

Liquid Crystal Noise Eater Chapter 6: Specifications
Rev A, September 21, 2021 Page 11
Chapter 6 Specifications
Item #
NEL01A(/M) NEL02A(/M) NEL03A(/M) NEL04A(/M)
Operating Wavelength
Range
425 – 650 nm 475 – 650 nm 650 – 1050 nm 1050 – 1620 nm
Output Power Stability
a
0.05% (Standard Deviation)
Noise Attenuation
Frequency Range
b
DC - 1.8 kHz DC - 2.5 kHz DC - 1.4 kHz
Noise Attenuation
Amplitude Range
0.1% to 50% of Input Signal
Noise Attenuation
Factor
c
>150 at 10 Hz, 80 at 60 Hz,
20 at 400 Hz, 4 at 1 kHz
>150 at 10 Hz,
80 at 60 Hz,
10 at 400 Hz,
1.5 at 1 kHz
Transmission
>85%
@ 635 nm
>80%
@ 635 nm
>85%
@ 780 nm
>85%
@ 1550 nm
Max Input Power See Section 5.2, Max Powers at Various Wavelengths
Min Input Power 0.5 mW
Polarization Extinction
Ratio
>1000:1 Over Wavelength Range
Laser Damage
Threshold (CW)
d
0.8 W/cm
2
8 W/cm
2
Effective Output Power
Attenuation Range
e
1 - 40 1 - 5
Internal Polarizer
Blocking Damage
Threshold
1 W/cm
2
10 W/cm
2
Attenuation Control Onboard Potentiometer (10 Turns) or SMA Modulation Input
Input Aperture
∅5 mm
Input Beam Diameter
f
∅4 mm (Max)
Output Displacement 1 mm Vertically (in the Direction of Input Polarization)
Max Beam Divergence 5 mrad
Max Incidence Angle ±2°
Input Polarization
Tolerance
±3°
Wavefront Distortion ≤λ/4 at 635 nm ≤λ/2 at 635 nm ≤λ/2 at 635 nm
AR Coating R
avg
<0.5% from 400 – 650 nm
R
avg
<0.5% from
650 – 1100 nm
R
avg
<0.5% from
1050 – 1620 nm
Modulation Input
SMA Connector, 10 kΩ Input Impedance, 0 – 2.5 V
Extinction Ratio
g
512.6 7.7 6.5
Min Rise/Fall Time
h
0.65/7.3 ms 0.75/11.5 ms 2.8/25 ms
Mounting
Two 8-32 (M4) Threaded Holes for Post Mounting
30 mm Cage System Compatible, Ø1" Lens Tube Compatible
Operating Temperature 15°C to 45°C
Pulsed Laser Input
Repetition Rate
>1 MHz
a. RMS value over 8 hours.