Search Results - claire+gmachl

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High Peak Power (≥ 10 mW) Quantum Cascade Superluminescent Emitter

Princeton Docket # 15-3101-1Researchers in the Department of Electrical Engineering at Princeton University have developed a novel Quantum Cascade (QC) device to emit mid-infrared (mid-IR) superluminescent light with high power output. The high power superluminescent light has applications in mid-IR broadband absorption spectroscopy and mid-IR optical...
Published: 3/30/2022   |   Inventor(s): Nyan Aung, Mei Chai Zheng, Claire Gmachl
Keywords(s): laser
Category(s): Mechanical/Electrical Engineering

Noninvasive Mid-Infrared In Vivo Glucose Sensor

Noninvasive Mid-infrared in vivo Glucose Sensor Princeton Docket # 14-2945 Researchers in the Department of Electrical Engineering at Princeton University have developed a novel, noninvasive method to measure blood glucose levels. Development of this noninvasive in vivo glucose sensor may improve the quality of life for the more than 343 million...
Published: 11/9/2022   |   Inventor(s): Sabbir Liakat, Claire Gmachl, Anna Michel
Keywords(s): biomarker/diagnostic, diabetes, laser, life science research tools, medical device
Category(s): Biotechnology/Pharmaceuticals, Medical Devices/Diagnostics, Mechanical/Electrical Engineering

Broad Tunable Quantum Cascade Lasers with Multiple Strongly coupled Upper Laser States

Princeton Docket # 10-2616 Broadly tunable QC lasers are ideal candidates for multi-analyte mid-infrared spectroscopy application. However, the maximum tuning range is usually limited by the inherently narrow gain spectrum of intersubband transitions. Princeton researchers have developed a ¿continuum-to-bound¿ QC laser, with two lower injector...
Published: 3/30/2022   |   Inventor(s): Yu Yao, William Charles, Jianxin Chen, Claire Gmachl
Category(s): Mechanical/Electrical Engineering

Highly Power-Efficient Quantum Cascade Lasers with Ultra-Strong Coupling Injection

Princeton Docket # 09-2561 The transport of electrons from the injector ground level to the upper laser level in the active region of a QC laser significantly influences the laser performance. The stronger the coupling between these two levels, the faster electrons can be transferred into the active region, the better is the performance...
Published: 3/14/2024   |   Inventor(s): Qiang Liu, Anthony Hoffman, Matthew Escarra, Kale Franz, Claire Gmachl, Jacob Khurgin, Yamac Dikmelik
Category(s): Mechanical/Electrical Engineering

Long Optical Path Lengths by A Compact and Robust Chaotic Optical Multi-Pass Cavity

Princeton Docket # 08-2414 Typical optical gas sensors utilize multipass cells to probe molecular species by absorption spectroscopy. Existing multipass cells are usually costly, large, and lack robustness, which limits their use for portable systems. Princeton researchers have designed and fabricated a highly compact and robust optical...
Published: 4/3/2024   |   Inventor(s): Dongxia Qu, Claire Gmachl
Category(s): Mechanical/Electrical Engineering

Rapid and Minimally Invasive Quantum Cascade Wafer Testing

Princeton University Invention # 09-2523 Quantum Cascade (QC) wafer quality testing requires intensive processing and characterization. Conventional techniques used for wafer quality testing include photoluminescence, x-ray diffraction, Hall effect measurements, high resolution x-ray diffraction, transmission electron microscopy and secondary...
Published: 3/30/2022   |   Inventor(s): Claire Gmachl, Ekua Bentil
Category(s): Mechanical/Electrical Engineering

Low-Cost Single-mode Quantum Cascade Lasers

Princeton Docket # 10-2622 Currently available commercial single-mode QC lasers either employ distributed feedback or external cavity technique to achieve single-mode emission. Due to the complexity and yield issue of these techniques, the costs and thus the sale prices for single-mode QC lasers are very high, which is a crucial barrier...
Published: 6/6/2023   |   Inventor(s): Qiang Liu, Claire Gmachl, Kamil Sladek
Category(s): Mechanical/Electrical Engineering

Non-invasive device for measuring compounds and dissolved gasses in biological tissue using infrared absorption/reflection spectroscopy

Princeton University Invention # 09-2525 Researchers in the Department of Electrical Engineering and the MIRTHE Research Center, Princeton University have developed an eye-safe device that allows for non-invasive measurements of dissolved gasses and compounds in a patient¿s blood and tissue. Operating similar to a pulse-oximeter, health care...
Published: 3/30/2022   |   Inventor(s): Claire Gmachl, Scott Howard, David Roberts, Amir Shanechi
Category(s): Medical Devices/Diagnostics, Mechanical/Electrical Engineering, Biotechnology/Pharmaceuticals