Difference frequency generation spectrometer for simultaneous multispecies detection
نویسندگان
چکیده
منابع مشابه
Difference frequency generation spectrometer for simultaneous multispecies detection.
A difference-frequency generation based spectrometer system for simultaneous ultra-sensitive measurements of formaldehyde (CH2O) and Methane (CH4) is presented. A new multiplexing approach using collinear quasi-phase-matching in a single grating period of periodically poled lithium niobate (PPLN) is discussed and demonstrated for two pairs of pump and signal lasers to generate mid-infrared freq...
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Design, performance characteristics, and application of a room temperature mid-infrared laser spectrometer are reported. This compact instrument is based on differencefrequency mixing of a widely tunable external-cavity diode laser and a diode-pumped monolithic Nd:YAG ring laser in periodically poled lithium niobate (PPLN). The differencefrequency tuning range of 3.98 μm to 4.62 μm was sufficie...
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A laser spectrometer based on difference-frequency generation in periodically poled LiNbO3 (PPLN) has been used to quantify atmospheric formaldehyde with a detection limit of 0.32 parts per billion in a given volume (ppbV) using specifically developed data-processing techniques. With state-of-the-art fiber-coupled diode-laser pump sources at 1083 nm and 1561 nm, difference-frequency radiation h...
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High-sensitivity detection of formaldehyde (CH2O) at 3.5315 micrometers (2831.64 cm-1) is reported with a diode-laser-pumped, fiber-coupled, periodically poled LiNbO3 spectroscopic source. This source replaced the Pb-salt diode laser Dewar assembly of an existing tunable diode-laser absorption spectrometer designed for ultrasensitive detection of CH2O. Spectra are recorded with 2f-modulation sp...
متن کاملTunable, fiber coupled spectrometer based on difference-frequency generation in periodically poled lithium niobate
A Yb-fiber amplifier seeded by a 1083 nm DBR diode laser is fiber coupled with an external cavity diode laser (814 nm to 870 nm) and differencefrequency mixed in a periodically poled lithium niobate crystal (3.25 μm to 4.4 μm). Phase matching characteristics and the spectroscopic detection of several trace gases using this compact sensor will be reported. OCIS code: (190.2620) Frequency convers...
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ژورنال
عنوان ژورنال: Optics Express
سال: 2010
ISSN: 1094-4087
DOI: 10.1364/oe.18.027670