NOTICE OF INTENT Diode-Pumped Frequency-Doubled Laser

The National Institute of Standards and Technology (NIST) is seeking a Diode-Pumped Frequency-Doubled Nd:YVO4-Laser. The laser must meet specific requirements, including delivering greater than 18 Watts at 532 nm, having a single longitudinal mode output, and meeting certain standards for pointing stability, frequency stability, and amplitude noise. The laser must also have a warm-up time of 20 minutes or less and a power requirement of 110 VAC, 60 Hz, and less than 20 Amp. The laser head and power supply must also meet certain size requirements. Some key features of the required laser include: • Dual 40 Watt diode-array pumped Nd:Vanadate, intracavity doubled laser • Frequency doubling accomplished with temperature-stabilized LBO crystal • Hermetically sealed laser head with no user-adjustable controls and fiber optic connection • Single longitudinal mode output required • TEM00 output beam, 2.25 mm diameter (at 1/e2) with less than 0.5 mrad divergence required • M-squared <1.1 and ellipticity <10% • Pointing stability must be < 3 microrad/degree Celsius • Frequency stability must be <5 MHz over 50 msec • Amplitude noise must be <0.05% rms from 10 Hz to 1 GHz • Power stability drift must be +/- 1% or less over a two-hour or longer period • Polarization: Must have vertical orientation with >100:1 extinction ratio • Warm-up time from turn on to stabilized full output or at user-specified power level should be 20 minutes or less • Power requirements: 110 VAC, 60 Hz, <20 Amp • At least 1 year warranty • Must be able to provide 10,000 hours of continuous use without diode bar replacement • The size of the laser head should not exceed 18.3 x 5.5 x 5.5 inches • The size of the power supply should not exceed 18 x 20 x 12 inches