Frequency combs - Import export

TOPTICA's offset-free frequency comb DFC (Difference Frequency Comb) and tunable cw diode lasers (DL pro) can be combined into easy-to-use laser systems delivering frequency-stable cw-output at any wavelength between 420 nm and 2200 nm. A complete laser system contains a DFC CORE, wavelength extensions (DFC EXT), cw diode lasers (DL pro), beat units (DFC BC, DFC MD), all necessary stabilization electronics, a wavelength meter (High Finesse), RF-reference, counter, spectrum analyzer, control server (PC) and user software.

The DFC locking electronics consisting of the Phase Frequency Detector (PFD) and FALC 110 provides high-end phase frequency locking for comb applications. The PFD RF input is designed for use with the RF output signal of the DFC MD. The error signal generated by the PFD is fed to the input of the FALC 110 regulator. The main output of the FALC is passed through the PFD to allow for remote switching of the fast feedback loop which modulates the laser diode current. A copy of the error signal (mon. out) is used to close the slow feedback loop acting on the DL pro piezo (Fine In) with the all-digital PID of the DLC pro. Slow and fast feedback loop can be enabled and disabled with a push of a button in the DFC user interface (TOPAS DFC).

Complete stabilized laser systems including the DFC CORE, any desired wavelength extension, beat units, stabilization electronics, wavelength meters, counters, and lasers are now available from one source. Any of TOPTICA’s tunable diode lasers with a wavelength between 190 nm and 2200 nm can be locked to the DFC, lasers with shorter wavelengths can be stabilized using the fundamental of their SHG unit. The complete laser system is controlled from a single GUI. Please contact us for details and individual solutions!

TOPTICA's beat detection consists of two flexible modules: DFC BC and DFC MD. Separating beam combination and beat detection into two units allows for placing them at different locations. The DFC BC and DFC MD units are specifically designed for a combination of the DFC with TOPTICA's DL pro tunable diode laser series, but can also be used with other cw lasers.

Various extension modules are available that convert the offset-free fundamental output of the DFC CORE from 1560 nm to any desired wavelength between 420 nm and 2200 nm. The wavelength conversion in these modules is achieved with the well-established technology of TOPTICA’s ultrafast fiber lasers. All extension modules use highly stable all-fiber amplification, nonlinear conversion and compression. The output power of all extension modules allows for phase-locking of cw lasers. Special wavelength extensions are available on request or included in TOPTICA's complete stabilized laser systems.

Inspection of Surfaces 2D and 3D Regarding surface quality inspection for metal products such as cylinder head, gear tooth, it consumes a lot of time and human resources for the inspection. Since parts are inspected by bare eyes or slow speed inspection machines. With the inspection machine HE1000, inspection is much faster, more accurate and fully automated. In addition, there is a 3D laser sensor combined with our 2D inspection head to provide the most accurate result. This sensor is the first in the world to apply the Nobel Prize winning physics technology of optical frequency combs. It utilizes coaxial lasers and high precision range finders. There are some cases that our customers reduced over 90% of the inspection time. urthermore, if parts are inspected by humans, there might be different results by each person, because each of them has a different tendency and criterion.