Melles Griot 633-nm lasers have been field proven in applications ranging from simple alignment and pointing at construction sites and sawmills to precision measurement and ranging in the rigors of space. Typical lifetime is as high as 50,000 operating hours.
- High-power lasers, with output up to 35 mW, available in cylindrical or rectangular configurations, are ideal for Raman spectroscopy, fast scanning, and test-and-measurement applications that benefit from increased signal-to-noise performance.
- Stabilized single-frequency lasers, with coherence lengths measured in kilometers, are ideal for calibration, precision measurement, and ranging applications.
- Class II lasers (IEC Class 2), with power less than 0.95 mW, are ideal for pointing, alignment, and teaching applications where eye safety is of paramount concern.
- Self-contained lasers are ideal for general-purpose alignment applications.
Systems are offered in both self-contained and cylindrical configurations with separate power supply.
Green Helium Neon Lasers (543nm)
Green HeNe lasers have up to five times the visibility of red lasers with the same output power. Consequently, they are ideal for aiming and pointing applications. They also are the lasers of choice for many biotechnology, cytometry, microscopy, and graphics applications, since the wavelength closely corresponds to the peak absorption bands of fluorescent dyes, reagents, and film.
Green HeNe lasers are available with powers ranging from 0.20 mW to 2.00 mW, in linearly and randomly polarized configurations.
The 594-nm output wavelength of these lasers at closely corresponds to the sodium "d" and "D" lines which are used as a spectral reference in the optical industry. The wavelength also corresponds to the peak absorption of several popular fluorescent dyes.
A well-collimated beam, available linear polarization, and a wavelength that closely matches fiber-optic communications bands make these lasers ideal sources for testing and characterizing fiber optics.
Melles Griot stabilized helium neon laser systems are ideal for applications such as metrology, interferometry, and surface defect inspection that require a single, invariant frequency. These single-longitudinal-mode systems have a coherence length measured in kilometers, and exhibit excellent power stability for long periods of time. They permit highly repeatable, highly accurate measurements with superb resolution. The output is an economical and reliable calibration reference and a well-defined low-noise frequency source for fiber-optic and diode laser testing. Both output power and frequency can be varied over a wide range; however, changing the power will also change the frequency and vice versa. Critical specifications include:
- 1-MHz frequency stability at 473.61254 THz
- <0.2% power fluctuation over eight hours
- Frequency tunable over 300 MHz
- Linear polarization with >5000:1 extinction ratio.
Melles Griot high-power HeNe lasers are available with output ranging from 17 mW to 35 mW, making them ideal for Raman spectroscopy, holography, fast scanning, and test and measurement applications. Most are available with either random or linear polarization, and they can be mounted in a variety of orientations without sacrificing power or performance. Systems are convection cooled and operate from standard 115-Vac or 230-Vac outlets. The 17-mW systems are packaged in a cylindrical housing. The 25- and 35-mW systems are packaged in a rectangular housing.