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.
We report continuous mode-hop free tuning of a sample-grating distributed Bragg reflector (SG-DBR) quantum cascade laser (QCL) operating at 4.55µm wavelength observing N2O features in this range by controlling all three sections of laser namely: front DBR, back DBR and the phase.
We demonstrate 2W CW output power with a DBR QCL mounted epi-down at 20 °C. Single mode operation with a SMSR of 30 dB was achieved with the wavelength around 4.48 μm. The maximum pulsed peak power of this laser reached 3.36 W at 20 °C. The maximum pulsed and CW WPEs reached 14.7 % and 10.3 % at 20 °C, respectively.
We characterized the performance of sampled-grating distributed Bragg reflectors (SG DBR) quantum cascade lasers (QCLs) and demonstrated a wide wavelength tuning from 4.48 to 4.69 μm (100cm−1) by injecting current into the SGDBR sections.
We have developed a compact sensor system for environmental CO2 studies based on quantum cascade laser. The sensor targets the strongest fundamental CO2 ro-vibrational band at 4.24μm and requires only 8mm optical path to provide sensitivity of 2 ppm.
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.