The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Room-temperature, narrow-linewidth terahertz quantum cascade laser sources based on intracavity Cherenkov difference-frequency generation with emission at 3.5 THz, nearly 60μW power output, and conversion efficiency of approximately 0.55 mW/W2 are reported.
Two separate contacts are incorporated into the different arms of Quantum Cascade lasers with asymmetric Mach-Zehnder interferometer type cavities. Preliminary results reveal an almost-continuous single mode tuning range of 20 cm−1 at 80K.
We demonstrate single mode operation of Quantum Cascade lasers employing a folded Fabry-Perot resonator waveguide design. Single mode emission is achieved with ∼20dB side mode suppression up to ∼400mA above threshold current in pulsed operation.
Temperature-dependent optical gain and waveguide loss have been measured for continuous-wave operated quantum-cascade lasers with wavelengths between 8.2 and 10.2 mum up to room temperature using the Hakki-Paoli method. The gain coefficient decreases with increasing temperature, and is close to the designed value for vertical transition lasers, but smaller than the designed value for diagonal transition...
Room temperature, continuous-wave operation of lambda~8.2 mum quantum cascade lasers grown by MOCVD is reported. The lasers have been processed as double-channel ridge waveguides without the need for buried heterostructures.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.