Made Easy: CW Laser Light Widely Tunable Across the Visible

Abstract

At HÜBNER Photonics, we not only make gamechanging lasers, but also rethink all kinds of other technologies including terahertz imaging and high-frequency radar. Since 2015, our portfolio has been further reinforced by the acquisition of Cobolt, a world leading manufacturer of high performance lasers for analytical instrumentation. Together, we unite proven corporate values with innovative ideas and top-notch technologies for the whole electromagnetic spectrum. www.hubner-photonics.comCompany A remarkable number of photonic applications call for continuous-wave (cw) laser light that is widely tunable throughout the visible range of the spectrum. However, this spectral region remains difficult to access with conventional tunable laser devices. This is why recently commercialized sources based on cw optical parametric oscillator (OPO) technology gain market awareness -and become increasingly recognized as cost-effective and user friendly turn-key solutions.

The Perfect Qubit: How Tunable Light Helps in the Quantum Quest

“…Over the last few years, however, improved design techniques have yielded more sophisticated and more efficient nonlinear materials, such as periodically-poled lithium niobate, that can be phase-matched to the pump laser. A new generation of continuous-wave lasers also provides higher pump powers across the frequency spectrum, making it possible for the first time to produce widely tunable cw OPOs in a turnkey system that delivers narrow-linewidth output at powers levels of a few hundred milliwatts [1].…”

Energy Scaling, Second Stokes Oscillation, and Raman Gain-Guiding in Monolithic Diamond Raman Lasers

“…where R is the output mirror reflectivity at the 2 nd Stokes wavelength (50% at 620 nm),  is the absorption coefficient at the 2 nd Stokes wavelength (~0.05 cm -1 at 620 nm) and g573 is the Raman gain for a focused beam at the 1 st Stokes wavelength (573 nm), which in this case acts as the pump for the 2 nd Stokes emission and can be calculated using eq. (9).…”

“…where s1 is the 1 st Stokes wavelength, s2 is the 2 nd Stokes wavelength and g532 is, similar to g573, the Raman gain for a focused beam at the pump wavelength of 532 nm calculated using eq. (9).…”

“…The ideal laser for such application would be a tunable laser (e.g. dye-based lasers [4][5][6] or OPO systems [7][8][9]); however, these systems are often complex and expensive. Simpler, more compact and less expensive devices for frequency conversion of robust and commercially-available lasers are desirable for such applications.…”

A new calibration implementation for Doppler Coherence Imaging Spectroscopy

“…A newly developed, widely tunable continuous-wave (CW) laser (called "C-Wave") based on optical parametric oscillation (OPO) provides monochromatic line emission over nearly the entire visible spectrum (450-525 nm and 540-650 nm) and the near infra-red (900-1300 nm) ( [6]). For the Doppler CIS at W7-X, the C-Wave laser was specifically customized to apply precise wavelength selection with an accuracy of < 0.1 pm and wavelength scanning over a range of ±50 pm around a chosen wavelength λ 0 .…”