Helium-Neon (HeNe) Laser
F R E Q U E N C Y A N D I N T E N S I T Y S TA B I L I Z E D
The 633 nm Frequency/Intensity Stabilized Helium-Neon (HeNe) Laser uses a highly
refined thermal compensation technique to provide an excellent balance of high output
power and stability, low temperature sensitivity, and reliability. An extremely versatile
research and instrumentation tool, it can toggle instantly via front panel control between
intensity and frequency stable modes. In intensity stabilized mode, the HeNe laser will
operate as an output power reference, with the stability of < ±0.2% (1 hour), while in the
frequency stabilized mode, frequency stability as low as < ±3 MHz can be obtained over
an 8 hour period. Utilizing enhanced designs and superior optical components, the laser
delivers unsurpassed operational stability and lifetimes. The mirror quality and
performances are optimized to result in the highest quality HeNe lasers available in the
market. This high-performance laser is supported by a one-year warranty.
Design Note
Stabilized HeNe Laser Advantages
• Operates in either stable-frequency or stable-intensity mode
• Long term (8 hr) frequency drift 3 MHz maximum
• Typical intensity stability better than 0.2% absolute (1 hour)
• Superior output power (>1.5 mW version available) from
single line, linearly polarized output
• Long coherence length
• CE Compliant
Applications
• Interferometry
• Holography
• Laser Doppler anemometry
• Spectroscopy
A Proprietary design and manufacturing technology deliver a highly stabilized and quiet
signal, immunity to ambient temperature drift and >1.2 mW of clean, stable and reliable
output power. Designed for many applications where the temperature environment cannot
be rigorously controlled, the frequency stability specifications include both a specified
frequency range per time interval and per temperature interval. With superb temperature
sensitivity, Newport’s Intensity-Frequency Stabilized Helium Neon (He-Ne) laser achieves
reliable stability over the widest range of conditions.
Choose Operation Mode Depending on Your Application
Frequency stability for long path difference interferometry, metrology, holography,
spectroscopy and frequency marking. The short-term frequency stability of the laser makes
it an excellent choice for interferometers with unequal arms. With the coherence length
on the order of 100 m, the helium neon (He-Ne) laser is ideal for large depth-of-field
applications in holography and metrology. Frequency stability further enhances coherence
length for critical measurements or exposures.
Intensity stability for surface texture characterization, velocimetry, scattering and polarization.
The simple, one-button intensity lock ensures highly stable (less than 0.1% over short intervals)
output power, ideal for applications where optical signal strength varies with changes in the
test subject. Examples include surface scattering, profilometry, and single axis velocimetry.
• Inspection systems
• Medical imaging
• Flow cytometry
Mounts sold separately
Cylindrical Laser Mount assembly with Rod and Rod Clamp
Helium-Neon (HeNe) Laser
Specifications
Frequency Stabilized Mode
R-32734
R-39727
Frequency Stability (MHz)
1 minute
±1
±1
1 hour
±1
±1
±2
±2
Intensity Stability (%)
1 day (8 hr. period)
±1
±1
Frequency Shift with Temperature (MHz/°C)
<2
<2
Intensity Stabilized Mode
Intensity Stability (%)
1 minute
±0.1
±0.1
1 hour
±0.2
±0.2
Frequency Stability (MHz)
1 minute
±3
±3
1 hour
±5
±5
>1.5
>1.2
Either Mode
Output Power (mw)
@ 632.8 nm
Beam Characteristics
Beam Diameter (mm) at 10 cm from front bezel
0.7
0.7
Beam Divergence Full Angle (mrad)
<1.2
<1.2
Spatial Mode
Polarization
TEMoo
TEMoo
Linear >800:1
Linear >800:1
15 - 30
15 - 30
General Specifications
Temperature Range to Maintain Lock (˚C)
Time to Lock (min)
Power Requirements
<30
<30
120/240 VAC, 50/60 Hz
120/240 VAC, 50/60 Hz
< 40
Electrical Power Consumption (W)
< 40
CDRH Class
IIIa
IIIa
CE Certified
Yes, 3R
Yes, 3R
ULM or ULM-TILT
ULM or ULM-TILT
Suggested Laser Mount
Dimensions
Laser Head Size [in. (mm)]
Power Supply Size (WxHxD) [in. (mm)]
1.75 dia. x 15.0 (44.5 dia x 381)
1.75 dia. x 15.0 (44.5 dia x 381)
2.05 x 6.50 x 8.90 (52 x 165 x 226)
2.05 x 6.50 x 8.90 (52 x 165 x 226)
Ordering Information
Model
Description
R-32734
Frequency and Intensity Stabilized HeNe Laser, 633 nm, 1.5 mW, CE
R-39727
Frequency and Intensity Stabilized HeNe Laser, 633 nm, 1.2 mW, CE
ULM
Cylindrical Laser Mount, 1.0-1.75 in. Diameter, Fixed
ULM-TILT
Cylindrical Laser Mount, 1.0-1.75 in., High-Resolution AJS Adjusters
ULM-TILT-M
Cylindrical Laser Mount, 1.0-1.75 in. Diameter, SM-13 Micrometers
www.newport.com
Newport Corporation, Global Headquarters
1791 Deere Avenue, Irvine, CA 92606, USA
PHONE: 1-800-222-6440 1-949-863-3144
FAX: 1-949-253-1680
EMAIL: [email protected]
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Taiwan
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+886 -(0)2-2508-4977
Irvine, CA, USA
Netherlands
PHONE
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+31-(0)30 6592111
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EMAIL
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Newport Corporation, Irvine and Santa Clara, California and Franklin, Massachusetts;
Evry and Beaune-La-Rolande, France; Stahnsdorf, Germany and Wuxi, China have
all been certified compliant with ISO 9001 by the British Standards Institution.
DS-011403