The R-33361 Green HeNe Laser generates a 500:1 linearly polarized output of 1.5 mW (minimum) at 543 nm. Longitudinal mode frequency is approximately 303 MHz. Utilizing enhanced designs and superior optical components these HeNe lasers deliver unsurpassed operational stability and lifetimes. The mirror quality and performances are optimized to result in the highest quality HeNe lasers available in the market. These high-performance lasers are supported by a one-year warranty and are available off-the-shelf. CE compliant, Class 3R.The power supply is included.