The QTekLaser™ 432 – 515 nm Fiber Laser class utilizes two second-harmonic generation (SHG) stages to deliver stable, single-frequency, polarization-maintaining light at up to 1.5 W. An IoT-enabled interface and 19" rack-mount chassis make it straightforward to integrate into quantum and precision-spectroscopy systems.
QTekLaser™ further extends the wavelength range of its fiber lasers by cascading two second-harmonic generation (SHG) stages. The output of a single-frequency fiber amplifier is first frequency-doubled. The resulting light is then doubled again in a second nonlinear crystal, producing light at one quarter of the fundamental wavelength (figure 4). Starting from our Tm-doped fiber amplifiers (1730 – 2060 nm), fourth-harmonic generation (FHG) reaches the blue-green regime from 432 to 515 nm. High-power, narrow-linewidth light at these wavelengths is difficult to obtain directly from diode or fiber sources. Each conversion stage keeps the single-frequency character of the seed laser, so FHG systems deliver narrow linewidth, low relative intensity noise and excellent beam quality. The maximum power of FHG systems is constrained by the combined efficiency of the two conversion stages and by the damage threshold of the nonlinear crystals at shorter wavelengths.
QTekLaser™ lasers comply with Federal Regulations (21 CFR Subchapter J, Part 1040) as administered by the Center for Devices and Radiological Health and are certified to IEC 60825-1:2014 standards.
Strontium-based quantum computing, optical clocks and atomic physics. This wavelength drives the 5s5p ³P₂ → 5s5d ³D₂ transition in neutral strontium. That transition repumps atoms stranded in the long-lived ³P₂ state back into the cooling cycle, which keeps atom number and loading rate high in magneto-optical traps, optical lattices and tweezer arrays.
