Product Details

The ZYGO 8070-0902-03 is a discontinued air-cooled two-frequency He-Ne heterodyne laser head of ZMI-7705 series, designed to work with ZMI-501A measurement electronics module for high-precision displacement metrology systems. It is widely deployed in semiconductor wafer positioning stages, optical inspection platforms and custom ultra-precision motion systems that require sub-nanometer measurement resolution. It outputs 632.8nm frequency-stabilized laser with two orthogonal linear polarization frequencies, fixed beat frequency difference of 20MHz ±1600Hz, providing stable beat reference signal for heterodyne interferometer decoding.

This 8070-0902-03 variant has optimized optical power and beam quality, matching the optical input requirement of ZMI-501A electronics perfectly. It integrates built-in high-performance optical isolator to block back-reflected light from interferometer optics and retroreflectors, effectively preventing frequency lock loss and measurement jump. The power supply is ±15VDC and +5VDC, it takes about 25 minutes to reach full wavelength stability after power on. Multiple ZMI-7705 laser heads can be synchronized for multi-axis stage systems. Its fiber coupling interface and beam parameters are exclusive to ZMI-7705, cannot be directly replaced with conventional 7702 series laser heads.

It is equipped with BNC RF beat output port, laser interlock and temperature monitoring interface. The front panel has power and laser lock status LED indicators for routine inspection and fault diagnosis. The housing adopts vibration damping structure and EMC shielding design to reduce electromagnetic interference from linear motors and servo drivers in cleanroom environments. Users need to confirm the full part number 8070-0902-03 and model ZMI-7705 before replacement, and match the supporting ZMI-501A measurement electronics, fiber assembly and interferometer optics. This legacy ZYGO 8070-0902-03 ZMI-7705 laser head is mainly supplied as spare replacement part for existing ZMI metrology systems. Users need to verify optical power, frequency difference and optical path alignment after installation. A conformal coated version is optional for high humidity and dusty industrial sites. This laser head is widely used in precision metrology bench renovation, wafer stage maintenance and sub-nanometer closed-loop motion feedback projects.

This two-frequency He-Ne laser head adopts standalone compact housing structure. It requires ±15VDC and +5VDC power supply. LED indicators display power and laser lock status for convenient on-site inspection. The optimal operating temperature range is 15°C to 30°C, storage temperature ranges from -40°C to +85°C, relative humidity 5% to 50% non-condensing. It complies with industrial shock, vibration and EMC standards and has CE certifications. It supports optical path calibration backup for fast recovery after hardware replacement.

This ZYGO 8070-0902-03 laser head is widely applied in high-precision laser interferometer measurement systems. It provides stable two-frequency laser source for ZMI-501A measurement electronics. As a reliable spare part for ZYGO legacy metrology systems, the ZMI-7705 retains original heterodyne frequency characteristics and optical compatibility, helping customers reduce maintenance cost of legacy ultra-precision measurement equipment.