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For a limited time, when you buy any low noise QCL LAB Instrument, receive a PTC10K-CH Precision Temperature Controller for free. The patented technology of the QCL LAB quantum cascade laser driver reduces jitter, minimizes noise for narrow linewidth and delivers exceptional current stability for repeatable scans. The milliKelvin temperature stability of the PTC controller supports highly stable wavelength output.
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Generating single-mode, narrow-band photons with high purity and brightness has proven to be difficult. Researchers at the University of Vienna have designed a photon source using Spontaneous Parametric Down-Conversion (SPDC) with a doubly resonant Optical Parametric Oscillator (OPO) utilizing an additional birefringent crystal to tune clusters independent of SPDC phase-matching.
The Optical Parametric Oscillator (OPO) is highly dependent on the temperature of the crystal. Changing temperature alters the index of refraction which changes the wavelength of the light. The crystal can also change length due to temperature, causing a shift in efficiency and cluster tuning capabilities. Temperature regulation of both crystals in the OPO cavity is essential.
Wavelength Electronics’ PTC5K-CH controlled the temperature of the crystals in the OPO cavity with precision better than 2 mK, generating the necessary crystal stability.
Special thanks to AMS Technologies, European Distributor for over 23 Years
AMS Technologies is our longest-term and most trusted Distributor. They stock all our most popular products to provide fast delivery times. AMS is a key player in bringing Wavelength products to the European continent. Their highly technical team provides the best product support for both OEM designs and bench top applications.
We have a fantastic working relationship and look forward to many more years! Thank you from the Wavelength Electronics Team! For further information please visit www.amstechnologies.com.
AMS Technologies is Europe’s leading solution provider and distributor for Optical, Power and Thermal Management Technologies. From a network of local offices in Germany, the UK, France, Italy, Spain, Poland and Sweden, AMS Technologies supports customers with solutions that allow them to take a prime position in a variety of high-tech markets. Wavelength Electronics’ drivers and controllers ideally complement AMS Technologies’ portfolio of laser diodes, laser systems, thermoelectric and resistive thermal management components as well as the turnkey solutions AMS Technologies is designing and manufacturing to meet the company’s customers’ demanding specifications.
Researchers at Northwestern University, Illinois have designed a terahertz (THz) frequency comb using a Quantum Cascade Laser (QCL) with a Distributed Feedback (DFB) grating inside the cavity. The DFB grating addition allows for dual wavelength emission from the QCL. A single-mode state and a harmonic comb state combine inside the cavity for a THz frequency comb. The device generates THz frequencies at room temperature without any external optical setup. This allows for a harmonic frequency comb at 3.0 THz with a range of 2.2 to 3.3 THz. With the single QCL dual wavelength emission, the THz comb is more stable than multiple sources. This devices enables a greater current dynamic range for harmonic comb operation, especially useful in spectroscopy applications. Two uses of QCL frequency combs demonstrated by researchers at Harvard University are also discussed.
The QCLs operation state is highly dependent on the injection current. Because the harmonic comb state is accomplished with slightly more current than single-mode state, it is crucial that the QCLs are properly and accurately driven and have stable temperature control. Wavelength Electronics’ QCL2000 LAB QCL drivers provide the necessary stability for harmonic frequency combs. Wavelength Electronics’ PTC10K-CH temperature controller has temperature stability of less than 0.0012ºC which surpasses the required temperature stability of less than 10 mK in the experiment. At Harvard University, both studies use Wavelength Electronics’ TC5 LAB to control the temperature of the QCLs with the same noise levels listed for the Northwestern University study.
Knowing how much and where ozone is in our atmosphere is important to daily life on Earth. Ozone present in the stratosphere is critical to protecting life from harmful radiation, but ozone in the troposphere is detrimental. NASA has created a network specifically tasked with measuring and mapping the ozone in the troposphere. This will allow researchers to analyze potential dangers with ozone levels and propose solutions to these problems. Bridger Photonics has developed a Differential Absorption LiDAR (DIAL) system for this network to measure ozone concentrations in an altitude range of 5 – 8 km in a compact, easy-to-use, and commercially available device. With final ultraviolet wavelength energies of 200 μJ (at 1 kHz repetition rate), Bridger Photonics has designed a high power output, low power consumption, and fast repetition rate solution to ozone concentration measurement.
The PTC10K-CH provides stable thermoelectric current to control the temperature of the laser diode arrays and the nonlinear crystal. This controller delivered the precision performance and long-term reliability Bridger Photonics required. The LD15CHA delivers up to 15 A of output current to the laser diode arrays which pump the solid state laser. Because Bridger Photonics operates the driver near limit, it is important that the output current never exceed the setpoint. The LD15CHA can be configured (setpoint and limit) without output current enabled.
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