Offset Frequency Laser Standard, LHJ-1F, Lasertex

LHJ-1F Offset Frequency Laser Standard

LHJ-1F is a high-precision offset frequency laser standard designed for the calibration and comparison of helium-neon lasers with a wavelength of 632.8 nm. The system is based on the LJSC-03-11 platform, where the absolute laser frequency is determined by an iodine vapor cell and used as feedback for stabilizing a higher-power laser. The device provides the same frequency accuracy and stability as the LJSC-03-11, while offering helium-neon tube output power of up to 1 mW.

The higher-power laser tube is synchronized with the stabilized helium-neon reference tube, and the offset value can be adjusted by the user over a wide range without degrading the laser frequency accuracy. LHJ-1F is a unique laboratory solution featuring automatic absorption peak detection, graphical display of results, and remote control from a PC. Thanks to its robust and compact design, the unit is suitable for both laboratory and field applications, including precision measurements, laser spectroscopy, and other high-accuracy tasks.

Main features

• Wavelength: 633 nm.
• Output power: 0.7–1.0 mW.
• Absolute frequency accuracy: 2.5 × 10^-11 (12 kHz).
• Stabilization: based on an iodine vapor cell.
• Signal output: unmodulated output.
• Iodine components: manufactured and calibrated in accordance with BIPM requirements.

Functional capabilities

• Fully automatic operating mode.
• Automatic absorption peak detection.
• Graphical VFD display for result visualization.
• Remote control from a personal computer.
• Optical output via SMF or PMF (FC / APC).
• Turn-and-push user control interface.

Advantages

• High accuracy and stability: delivers reference-grade frequency performance for laser calibration and comparison.
• Adjustable frequency offset: allows wide-range offset tuning without compromising accuracy.
• Higher output power: up to 1 mW for applications requiring stronger optical output.
• Ease of use: full automation, display, and remote PC control simplify operation.
• Compact all-in-one design: suitable for laboratory and portable field use.
• Wide range of applications: ideal for precision metrology, spectroscopy, and other demanding optical tasks.