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Express"],"published-print":{"date-parts":[[2024,6,17]]},"abstract":"<jats:p>This paper reports on the experimental demonstration of a fully integrated frequency-modulated continuous-wave (FMCW) LiDAR sensing system, operating at 2.0 \u00b5m. It makes use of a widely tunable hybrid external cavity laser based on the combination of GaSb gain chip and silicon waveguide circuits. The single-frequency laser operation over the full spectral bandwidth of the gain chip is secured using a frequency-selective filter, consisting of two sequential microring resonators in a Vernier configuration. To increase the mode-hop free wavelength tuning range while preserving the linewidth of the laser, the heater of the phase section placed along the bus waveguide is synchronously controlled with two independent heaters placed on each microring resonator. This laser is then implemented for the development of an FMCW LiDAR, consisting of all-optical fiber-based two independent unbalanced Mach-Zehnder interferometers: k-space interferometer for the linearization of continuously swept laser frequency and main interferometer for the measurement of the distributed back-reflection over the distance. The optical frequency of the laser is continuously swept over a \u223c100\u2005GHz range (or \u0394\u03bb=1.47\u2005nm at the operating wavelength) at a modulation speed of 100\u2005Hz. Using this wavelength tunable laser, a light detection and ranging system (LiDAR) is experimentally demonstrated, showing a very high axial resolution of 1.36 mm in air with an extremely high precision of \u223c9 \u00b5m at a 100\u2005Hz measurement rate.<\/jats:p>","DOI":"10.1364\/oe.522398","type":"journal-article","created":{"date-parts":[[2024,5,23]],"date-time":"2024-05-23T05:00:09Z","timestamp":1716440409000},"page":"22470","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Development of hybrid photonic integrated wavelength-tunable laser at 2 \u00b5m and its application to FMCW LiDAR"],"prefix":"10.1364","volume":"32","author":[{"given":"Sanghoon","family":"Chin","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/05nrrsx06","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jannis","family":"Holzer","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/05nrrsx06","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andreas De","family":"Groote","sequence":"additional","affiliation":[{"name":"Brolis Sensor Technology B.V."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daan","family":"Martens","sequence":"additional","affiliation":[{"name":"Brolis Sensor Technology B.V."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Greta","family":"Naujokaite","sequence":"additional","affiliation":[{"name":"Brolis Sensor Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0791-8039","authenticated-orcid":true,"given":"Augustinas","family":"Vizbaras","sequence":"additional","affiliation":[{"name":"Brolis Sensor Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kristijonas","family":"Vizbaras","sequence":"additional","affiliation":[{"name":"Brolis Sensor Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christophe","family":"Pache","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/05nrrsx06","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2024,6,4]]},"reference":[{"key":"oe-32-13-22470-R1","article-title":"Airborne laser terrain mapping","author":"Starek","year":"2006"},{"key":"oe-32-13-22470-R2","first-page":"5114","volume":"5","author":"Cherian","year":"2012","journal-title":"Int. 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