The SHG pro is the device of choice if existing lasers are to be frequency doubled. Designed in TOPTICA’s pro technology, it unites highly stable performance and convenient operation. Mirror and crystal holders can be adjusted without opening the resonator cover. A wide range of non-linear crystals covers SHG wavelengths from 190 to 800 nm. TOPTICA offers competent support for adapting the unit to customer requirements.
The grating stabilized diode laser SHG pro is a medium power solution, for applications such as spectroscopy of atoms, ions and molecules, laser cooling and interferometry. Designed in TOPTICA’s proprietary pro technology, it combines best performance and ease-of-use – at moderate initial and operating costs. The system now includes fully-automated push-button coupling optimization into the SHG cavity and the output fiber. The package comprises a solid laser head and a DLC pro control rack. It can be upgraded to a TA-SHG pro, if an appropriate amplifier source is available.
The TA-SHG pro system, part of the UV / RGB solutions, comprises a tunable diode laser, a high power semiconductor (TA) and an integrated frequency doubling stage (SHG pro). Alternatively, it is available with a fiber (FA) or Raman fiber (RFA) amplifier. The SHG stage is a folded ring cavity in bow-tie configuration with excellent thermal and mechanical stability. The system now includes fully-automated push-button coupling optimization into the TA chip, the SHG cavity and the output fiber, as well as output power stabilization. It provides tunable laser radiation for spectroscopy, laser cooling, optical data storage, holography and interferometry.
TOPTICA is been able to push the frequency limits of frequency-domain spectrometers. Whilst one DFB laser at 1.5 µm offers a tuning range of approximately 600 GHz, a combination of three lasers covers the entire range from DC to 2.0 THz, or – using more elaborate combinations – even up to 2.7 THz. TOPTICA’s “Tuning Range Extension” thus provides access to frequencies that used to be beyond reach with commercial frequency-domain spectrometers.
An accessory to the TeraFlash pro, the Imaging Extension utilizes two precise linear stages to scan a sample through the focus of the terahertz beam. The translational movement is synchronized with the shaker of the TeraFlash pro, resulting in a high measurement speed of up to 16 pixel/sec. A “basic” setup is available for researchers who wish to use their own optical components, and a “complete” version includes parabolic mirrors for beam shaping and focusing.
TOPTICA’s TeraFlash smart utilizes a proprietary scheme dubbed ECOPS ("electronically controlled optical sampling"). The system comprises two synchronized femtosecond lasers, eliminating the need for a mechanical delay. This results in extremely high measurement speeds: the TeraFlash smart acquires 1600 complete terahertz waveforms per second, enabling terahertz-based thickness gauging at unprecedented speed. The system thus lends itself to measurements on rapidly moving samples, e.g. conveyor belts, papermaking machines, or extrusion lines.
Pulsed terahertz generation with leading-edge technology: InGaAs antennas provide about 30 µW power and a bandwidth of more than 5 THz. The emitter and detector modules, developed by Fraunhofer Heinrich-Hertz Institute (Berlin/Germany), feature a strip-line and a dipole antenna, respectively, and are packaged with a Silicon lens and SM/PM fiber. They make up the core component of TOPTICA’s TeraFlash pro and TeraFlash smart, but are available as individual modules too.
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.
Example: Phase frequency lock of DLC DL pro to DFC
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)
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
TOPTICA's iChrome CLE is a compact laser engine that combines four laser
lines in one box. All integrated colors are provided via one
polarization-maintaining single-mode fiber. It is available with 405, 488,
561 and 640 nm and more than 20 mW guaranteed output power after the fiber
each. The system guarantees a plug & play installation since it includes
TOPTICA's proprietary COOLAC automatic alignment technology.
This way the laser combiner system is ready-to-use after one simple button click. 561 nm laser light is generated by TOPTICA´s proprietary FDDL technology. Each laser line, including the 561nm FDDL, can be directly modulated up to a frequency of 1 MHz and TOPTICA's "Complete OFF" mechanism guarantees zero photons in the "off"-state.
The iChrome MLE comprises up to 3 different diode lasers and one DPSS
laser fully integrated in one compact housing. The individual lasers are
efficiently combined and delivered via an all-in-one PM/SM fiber output. The
microprocessor controlled system enables flexible OEM integration. High
speed analog and digital modulation allow fast switching of laser wavelength
TOPTICA’s ingenious COOLAC technology automatically aligns the system with a single push of a button. This feature ensures a constant optical output level even under strongly varying ambient conditions and completely eliminates the need for manual realignment - making the iChrome MLE the most advanced multi-line laser system on the market.
The SodiumStar system is a high-power “guide star” laser designed for adaptive optics control in ground-based telescopes. It is based on resonant frequency doubling of an infrared DFB diode laser with subsequent Raman fiber amplifier. More than 20 W are attained at the Sodium wavelength of 589 nm, with a spectral width of 5 MHz. The DL RFA SHG pro, a modified, sub MHz linewidth version with moderate power (2 W) is available for laser cooling experiments.
The laser of choice for interferometry, ellipsometry and semicon
inspection! TOPTICA has successfully developed a demonstration system of a
high-power laser at the classical HeNe wavelength of 633 nm. The system
employs mature near-infrared distributed-feedback (DFB) diode technology.
The research grade tunable diode laser system DLC TA-FHG pro is an ideal laser for test experiments in scientific or laboratory-like industrial environment (e.g. clean room). While not yet fully designed for 24/7 hands-off operation it comes very close to that. The DLC TA-FHG pro shows excellent passive stability due to patented and proprietary technology as well as a laser head manufactured from a solid metal block.
We have demonstrated our outstanding cw deep-UV (DUV, i.e. wavelengths below 205 nm) capabilities in several research prototypes and scientific publications. Our general technology portfolio to achieve UV wavelengths is based on two times resonantly frequency-doubling of an amplified external cavity diode laser (TA-FHG pro).