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  • TopMode High-Coherence, Single-Frequency OEM Lasers
Feb 2013
TOPTICA Photonics Inc.Request Info
VICTOR, N.Y., Feb. 28, 2013 — Toptica Photonics Inc.’s TopMode diode lasers provide high-coherence mode-hop-free operation. At blue-violet wavelengths, they achieve high single-frequency output power while operating as easily as a HeNe laser. They feature a spectral width of <5 MHz and a coherence length >25 m.

Proprietary CHARM (CoHerence-Advanced Regulation Method) technology actively stabilizes the lasers’ coherence and ensures continuous single-frequency operation. CHARM eliminates mode hops and prevents sudden step changes of the laser power or frequency, resulting in stability and enabling accurate measurements in tasks such as interferometry, holography, scatterometry, Raman spectroscopy, precision metrology, quantum cryptography and photonic down-conversion.

The 405-nm TopMode offers as much as 100-mW output power. Other available wavelengths are 445, 488, 515, 633 and 685 nm. Users can choose between a free-beam output and optional fiber coupling, via the proprietary and patented SmartDock coupler.

The TopMode CHARM digitally controlled electronics drives the lasers. The compact flat-pack design features a microprocessor for precise electric and thermal management and the CHARM stabilization. A professional graphical user interface enables starting and stopping the laser, and activation of the CHARM feedback loop, with just a mouse click.


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The optical recording of the object wave formed by the resulting interference pattern of two mutually coherent component light beams. In the holographic process, a coherent beam first is split into two component beams, one of which irradiates the object, the second of which irradiates a recording medium. The diffraction or scattering of the first wave by the object forms the object wave that proceeds to and interferes with the second coherent beam, or reference wave at the medium. The resulting...
The study and utilization of interference phenomena, based on the wave properties of light.
Raman spectroscopy
That branch of spectroscopy concerned with Raman spectra and used to provide a means of studying pure rotational, pure vibrational and rotation-vibration energy changes in the ground level of molecules. Raman spectroscopy is dependent on the collision of incident light quanta with the molecule, inducing the molecule to undergo the change.  
A measurement technique used for the rapid quantitative evaluation of surface quality based on the detection and analysis of light scattered from the surface.
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