Frequency measuring device LHJ-1F

laserlaboratoryfor control

Offset Laser Frequency Standard LHJ-1F is a wavelength reference device designed to be used for calibration and comparison of He-Ne lasers (632,8 nm wavelength). The model is based on LJSC-03-11 Laser. The absolute laser frequency is defined by the iodine vapour cell and serves as feedback to stabilise more powerful laser. The device provides the same frequency accuracy and stability as the LJSC-03-11 laser with the output power of a 1mW HeNe tube. The stronger tube is locked at a user chosen offset to the cavity stabilised HeNe tube. The offset value can be regulated in a wide range without degradation of laser frequency accuracy. Offset Laser Frequency Standard LHJ-1F is a unique laboratory device with automatic absorption peaks detection and presentation of results on the graphic display and with remote control from a PC computer. It differs from other commercially available lasers in that it requires no calibration in order to realise its full accuracy. Its rugged and compact design makes it suitable for laboratory and field applications like precision measurement, laser spectroscopy and other high accuracy applications. • 633 nm wavelength; 0.7 – 1.0 mW typical output power • Exceptional long-term accuracy – 2.5 parts in 1011 absolute frequency accuracy (12 kHz) • Modulation free output • Iodine cells manufactured and calibrated according to requirements of the Bureau International des Poids et Mesures (BIPM) • Fully automatic operation • Compact all-in-one design • SMF or PMF optic output (FC/APC) • VFD Display • Turn and click control