CO laser sum-frequency comb for atmosphere sensing

A High-Capacity Optical Metro Access Network: Efficiently Recovering Fiber Failures with Robust Switching and Centralized Optical Line Terminal

“…The scheme has a total bandwidth of 1.2 THz. The proposed network for OFC generation has successfully generated over sixty carriers which is higher than or equal in numbers to most of the cited works [ 19 , 20 , 25 , 28 , 34 ].…”

“…The cascaded arrangement of a different or a single modulator is one of several recent ways of generating OMCs [ 20 , 21 , 22 , 23 ]. The OMC is used in the optical access network [ 22 , 24 , 25 ], free space optics [ 26 ], in the OMAN [ 17 , 27 ], and for other applications [ 28 ]. By boosting efficiency and simplifying maintenance, the OMC generators deployed in an OMAN can efficiently deliver a variety of frequencies.…”

Compact Radio Frequency Discharge-Pumped Slab CO Laser System with a Zinc Germanium Phosphide (ZnGeP2) Sum-Frequency Generator for Remote Sensing of the Atmosphere

“…2 that the multiline operation mode makes it possible to obtain more than a thousand lines of frequency-converted radiation, which provides wide opportunities for their selection for gas analysis and makes it possible even to measure profiles of various gases absorption lines. 6 However, in the latter case, the lidar must be equipped with sophisticated spectral equipment to control the spectrum of the detected radiation. But a CO laser operating in the single-line mode does not require any wavelength control system in the receiving part of the lidar.…”

“…The number of laser lines can be increased by methods of nonlinear optics (due to intracavity generation of the second harmonic and the sum frequency in a nonlinear zinc germanium phosphide, or ZnGeP 2 crystal), and thereby enriches the spectrum of laser radiation in the indicated spectral range. 6 To determine, what this approach promises to the laser spectrum enrichment, we analyze the spectral composition of the laser radiation from the point of view of using such a laser for solving urgent problems of atmospheric sounding.…”

“…Earlier studies [6][7][8][9] as a rule are fragmented and focused on analysis of the content of one or little bit more specific gaseous components in the atmosphere. Moreover, they consider scientific CO laser facilities, which are not applicable for outdoor operation.…”