TY - RPRT TI - Calibration service for spectral responsivity of laser and optical-fiber power meters at wavelengths between 0.4µm and 1.8 µm AU - Lehman, John H PY - 1999 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST SP 250-53 DO - 10.6028/NIST.SP.250-53 ER -