TOPTICA’s new TopModediode lasers provide high-power, high-coherence mode-hop free operation. At blue-violet wavelengths, they achieve the highest single-frequency output power of any direct diode-based system while still operating as easily as a HeNe laser.
The TopMode lasers feature a spectral width of less than 5 MHz, translating into a coherence length greater than 25 m. TOPTICA’s 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. This results in an excellent stability of the diode laser and enables accurate measurements in demanding laser-based inspection and metrology tasks (e.g. interferometry, holography, scatterometry and Raman spectroscopy). Setting an industry record, the 405 nm TopMode offers as much as 100 mW output power. At the well-established HeNe wavelength of 633 nm, the corresponding model provides an output of 30 mW. Other available wavelengths are 445 nm, 515 nm, 488 nm and 685 nm. Users can choose between a free-beam output and optional fiber-coupling, realized with TOPTICA’s patented SmartDock™ coupler.