Monolithic photonic integration technology platform and devices at wavelengths beyond 2 μm for gas spectroscopy applications

S. Latkowski, P.J. van Veldhoven, A. Hänsel, D. D'Agostino, H. Rabbani-Haghighi, B. Docter, N. Bhattacharya, P.J.A. Thijs, H.P.M.M. Ambrosius, M.K. Smit, K.A. Williams, E.A.J.M. Bente

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In this paper a generic monolithic photonic integration technology platform and tunable laser devices for gas sensing applications at 2 μm will be presented. The basic set of long wavelength optical functions which is fundamental for a generic photonic integration approach is realized using planar, but-joint, active-passive integration on indium phosphide substrate with active components based on strained InGaAs quantum wells. Using this limited set of basic building blocks a novel geometry, widely tunable laser source was designed and fabricated within the first long wavelength multiproject wafer run. The fabricated laser operates around 2027 nm, covers a record tuning range of 31 nm and is successfully employed in absorption measurements of carbon dioxide. These results demonstrate a fully functional long wavelength photonic integrated circuit that operates at these wavelengths. Moreover, the process steps and material system used for the long wavelength technology are almost identical to the ones which are used in the technology process at 1.5μm which makes it straightforward and hassle-free to transfer to the photonic foundries with existing fabrication lines. The changes from the 1550 nm technology and the trade-offs made in the building block design and layer stack will be discussed.

Original languageEnglish
Title of host publicationIntegrated Optics
Subtitle of host publicationDevices, Materials, and Technologies XXI
Place of PublicationBellingham
ISBN (Electronic)9781510606531
ISBN (Print)978-1-5106-0653-1
Publication statusPublished - 1 Jan 2017
EventIntegrated Optics: Devices, Materials, and Technologies XXI - San Francisco, United States
Duration: 30 Jan 20171 Feb 2017

Publication series

NameProceedings of SPIE


ConferenceIntegrated Optics: Devices, Materials, and Technologies XXI
Country/TerritoryUnited States
CitySan Francisco


  • Gas spectroscopy
  • Photonic integrated circuits
  • Semiconductor laser
  • Tunable laser


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