TY - JOUR
T1 - Oxygen A-band absorption spectroscopy with solar photon counting and lithium niobate nanophotonic circuits
AU - Zhang, Jiuyi
AU - Sua, Yong Meng
AU - Hu, Yongxiang
AU - Ramanathan, Jeevanandha
AU - Huang, Yu Ping
N1 - Publisher Copyright:
Copyright © 2022 Zhang, Sua, Hu, Ramanathan and Huang.
PY - 2022
Y1 - 2022
N2 - Oxygen A-band measurements can provide important information about cloud top height, cloud physical and optical thickness, and surface atmospheric pressure. So far, O2 A-band measurements are typically made with spectrometers at a spectral resolution of 40 p.m. (such as in the OCO-2 satellite) or a coarser resolution. This paper reports a new CubeSat measurement concept with higher spectral resolution over the O2 A-band using integrated photonic circuits and solar photon counting techniques. An integrated Micro-ring filter (MRR) chip with 10 p.m. resonant linewidth with an extinction ratio of 25 dB or higher is designed, fabricated, and used for precise measurements of the atmospheric oxygen A-band absorption line-shapes around 770 nm. With solar-photon counting and using a narrow-band filter made of an integrated, fast-swept MRR on lithium niobate on insulator (LNOI), we have demonstrated a high-resolution measurement of the O2 A-band absorption spectrum, exhibiting good agreement with the HITRAN database.
AB - Oxygen A-band measurements can provide important information about cloud top height, cloud physical and optical thickness, and surface atmospheric pressure. So far, O2 A-band measurements are typically made with spectrometers at a spectral resolution of 40 p.m. (such as in the OCO-2 satellite) or a coarser resolution. This paper reports a new CubeSat measurement concept with higher spectral resolution over the O2 A-band using integrated photonic circuits and solar photon counting techniques. An integrated Micro-ring filter (MRR) chip with 10 p.m. resonant linewidth with an extinction ratio of 25 dB or higher is designed, fabricated, and used for precise measurements of the atmospheric oxygen A-band absorption line-shapes around 770 nm. With solar-photon counting and using a narrow-band filter made of an integrated, fast-swept MRR on lithium niobate on insulator (LNOI), we have demonstrated a high-resolution measurement of the O2 A-band absorption spectrum, exhibiting good agreement with the HITRAN database.
KW - cubesat
KW - oxygen A-band
KW - oxygen absorption spectrum
KW - photonic integrated circuits
KW - remote sensing
KW - solar photon counting
KW - thin film lithium niobate
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U2 - 10.3389/frsen.2022.1064244
DO - 10.3389/frsen.2022.1064244
M3 - Article
AN - SCOPUS:85183369471
VL - 3
JO - Frontiers in Remote Sensing
JF - Frontiers in Remote Sensing
M1 - 1064244
ER -