| DOI | Resolve DOI: https://doi.org/10.1117/12.2529367 |
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| Author | Search for: Cheriton, Ross1; Search for: Sivanandam, Suresh; Search for: Densmore, Adam2; Search for: Melati, Daniele3; Search for: Kamandar Dezfouli, Mohsen3; Search for: Xu, Danxia3; Search for: Schmidt, Jens; Search for: Lapointe, Jean3; Search for: Simard, Luc2; Search for: Cheben, Pavel3ORCID identifier: https://orcid.org/0000-0003-4232-9130; Search for: Janz, Siegfried3 |
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| Editor | Search for: Levan, Paul D.; Search for: Sood, Ashok K.; Search for: Wijewarnasuriya, Priyalal |
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| Affiliation | - National Research Council of Canada. Security and Disruptive Technologies
- National Research Council of Canada. Herzberg Astronomy and Astrophysics
- National Research Council of Canada. Advanced Electronics and Photonics
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| Format | Text, Address |
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| Conference | Infrared Sensors, Devices, and Applications IX, August 11-15, 2019, San Diego, United States |
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| Abstract | Astronomical instrumentation is traditionally costly, large, and alignment-sensitive owing to the use of bulk optics. The use of integrated photonic devices in astronomical instrumentation can mitigate such drawbacks in certain applications where high light throughput and spectral bandwidth are less crucial. In this work, we present an ultra-compact carbon dioxide detection scheme using a single silicon waveguide ring resonator. The comb-like absorption line spectrum of CO₂ around 1580 nm wavelength can closely match the comb spectrum of an appropriately designed ring resonator. By actively correlating such a ring spectrum with the CO₂ absorption lines, a specific detection signal can be generated. We design the free spectral range of a ring resonator to match the absorption line spacing of carbon dioxide lines in the range from 1575 to 1585 nm. Using thermo-optic modulation, the ring resonator drop or through port transmission spectrum can be shifted back and forth across the incoming CO₂ light spectrum, resulting in a modulated signal with an amplitude proportional to the CO₂ absorption line strength. Furthermore, high frequency modulation and lock-in detection can result in a significant improvement in the signal to noise ratio. We demonstrate that such a device can provide real-time carbon dioxide detection for applications in ground- and satellite-based astronomy, as well as remote atmospheric sensing, in a compact package. In future work, such a sensor can be adapted to a range of gases and used to determine radial velocities and compositional maps of astronomical objects. |
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| Publication date | 2019-09-12 |
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| Publisher | Society of Photo-Optical Instrumentation Engineers (SPIE) |
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| Series | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 68ad7186-6d11-46db-84a3-b1c17396f645 |
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| Record created | 2020-01-07 |
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| Record modified | 2021-04-23 |
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