WebJan 1, 2024 · Dual-Comb Spectroscopy. Using paired coherent frequency combs for broadband molecular spectroscopy can provide dramatic gains in spectral resolution, sensitivity and data acquisition speed—and may help take the power of frequency comb spectroscopy out of the lab and into the field. Pairing objects can bring new functionality. WebDual-comb photoacoustic spectroscopy. Spectrally resolved photoacoustic imaging is promising for label-free imaging in optically scattering materials. However, this technique often requires acquisition of a separate image at each wavelength of interest. This reduces imaging speeds and causes errors if the sample changes in time between images ...
Dual-comb quartz-enhanced photoacoustic spectroscopy
WebHere, we show the unmatched potential of dual-comb spectroscopy (DCS) in magnetic optical activity spectroscopy (MOAS) of gas-phase molecules with the resolution of hundred-MHz level and the high-speed measurement of sub-millisecond level. ... 2024. "A photoacoustic patch for three-dimensional imaging of hemoglobin and core … WebWu et al. reported a dual-gas quartz enhanced photoacoustic spectroscopy (QEPAS) sensor for H 2 O and C 2 H 2 with two near-infrared lasers, and the excited acoustic signals were separated by two different demodulation frequencies, i.e., the fundamental and the first overtone vibrations of the same QTF . flats to buy in blackpool
Dual-Comb Photoacoustic Spectroscopy Semantic Scholar
Figure 1 describes the concept of DCPAS. The DCPAS system is based on laser frequency combs whose frequency-domain output is tens of thousands of evenly spaced narrow lines or comb “teeth”. These teeth are spaced at the frequency-comb’s pulse repetition rate, frep, ((i) in Fig. 1)27. In the dual … See more Figure 2 shows the experimental setup for DCPAS. We use two self-referenced erbium fiber frequency combs at 160 MHz repetition rate. The output of each comb is amplified and filtered to generate light in a 15-THz-wide band … See more Figure 3 shows the DCPAS measurement results from a sample consisting of vertically aligned carbon nanotubes (VACNTs) embedded in PDMS (polydimethylsiloxane). This sample was chosen because … See more WebPhotoacoustic dual-comb spectroscopy is demonstrated, providing scan-free mapping of optical absorption spectra to acoustically detectable frequencies. Narrow absorption … WebFeb 17, 2024 · The result is a first step towards high-pulse-energy, low-noise, on-chip mode-locked lasers that imec is researching as a candidate for dual-comb PA spectroscopy. … flats to buy in beckton