Find Research outputs

Search results

• Integration and Packaging of Optoelectronic and Silicon Photonic Chips on a µm-scale SOI Platform

  Aalto, T., Harjanne, M., Kapulainen, M. & Ylinen, S., 2012, European Conference on Integrated Photonics website. 2 p. ThP128

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Professional

  Open Access

• Dramatic size reduction of waveguide bends on a micron-scale silicon photonic platform

  Cherchi, M., Ylinen, S., Harjanne, M., Kapulainen, M. & Aalto, T., 29 Jul 2013, In: Optics Express. 21, 15, p. 17814-17823

  Research output: Contribution to journal › Article › Scientific › peer-review

  Open Access
  146 Citations (Scopus)

• PIXAPP Photonics Packaging Pilot Line development of a silicon photonic optical transceiver with pluggable fiber connectivity

  Bundalo, I. L., Morrissey, P. E., Annoni, A., Baets, R., Blache, F., Breyne, L., Carroll, L., Collins, S., Dietrich, P. I., Halmo, L., Jorge, F., Karppinen, M., Kaunisto, M., Kelly, B., Vankerrebrouck, J., Koos, C., Lahti, M., Lambrecht, J., Tienforti, M., Lee, J. S., & 12 othersMissinne, J., Ossieur, P., Pessina, R., Sterken, T., Van Steenberge, G., Vannucci, A., Vannucchi, A., Verplancke, R., Wuytens, P., Xu, Y., Zoldak, M. & O'brien, P., 2022, In: IEEE Journal of Selected Topics in Quantum Electronics. 28, 3, 11 p., 8300311.

  Research output: Contribution to journal › Article › Scientific › peer-review

  Open Access

• Hybrid Integration of VCSEL and 3-μm Silicon Waveguide Based on a Monolithic Lens System

  Li, C., Bhat, S., Stabile, R., Song, Y., Neumeyr, C. & Raz, O., 1 May 2022, In: IEEE Transactions on Components, Packaging and Manufacturing Technology. 12, 5, p. 883-886 4 p.

  Research output: Contribution to journal › Article › Scientific › peer-review

• ESSenTIAL: EPIXfab services specifically targeting (SME) industrial takeup of advanced silicon photonics

  Pozo, J., Kumar, P., Cascio, D. M. R. L., Khanna, A., Dumon, P., Delbeke, D., Baets, R., Fournier, M., Fedeli, J-M., Fulbert, L., Zimmermann, L., Tillack, B., Tian, H., Aalto, T., O'Brien, P., Deptuck, D., Xu, J., Zhang, X. & Gale, D., 2012, Proceedings: 14th International Conference on Transparent Optical Networks, ICTON 2012. IEEE Institute of Electrical and Electronic Engineers, 6254391

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review
  6 Citations (Scopus)

• Photomic Devices and Methods of Using and Making Photonic Devices

  Purnawirman, P., Watts, M. R., Hosseini, E. S., Bradley, J. B., Sun, J. & Cherchi, M., 10 May 2018, IPC No. H01S 3/23, Patent No. US2018131155 A1, Priority date 28 Sep 2017, Priority No. US201715718045

  Research output: Patent › Patent application

• Low loss GaInNAs/GaAs gain waveguides with U-bend geometry for single-facet coupling in hybrid photonic integration

  Tuorila, H., Viheriälä, J., Cherchi, M., Aho, A. T., Aalto, T. & Guina, M., 23 Jul 2018, In: Applied Physics Letters. 113, 4, 041104.

  Research output: Contribution to journal › Article › Scientific › peer-review
  7 Citations (Scopus)

• Silicon Photonics

  Aalto, T., Arpiainen, S., Harjanne, M., Kapulainen, M. & Sami, Y., 2009, Finland-Japan Workshop on Nanophotonics and Related Technologies. Espoo: VTT Technical Research Centre of Finland, p. 42-45 (VTT Symposium; No. 255).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

  Open Access

• 3μm silicon photonics

  Aalto, T., Cherchi, M., Harjanne, M., Sun, F. & Kapulainen, M., 1 Jan 2018, 2018 Optical Fiber Communications Conference and Exposition, OFC 2018 - Proceedings. Optical Society of America OSA, Vol. Part F84-OFC 2018. p. 3-5 3 p. TU3A.5

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review
  3 Citations (Scopus)

• High-Frequency Mechanical Excitation of a Silicon Nanostring with Piezoelectric Aluminum Nitride Layers

  Pitanti, A., Makkonen, T., Colombano, M. F., Zanotto, S., Vicarelli, L., Cecchini, M., Griol, A., Navarro-Urrios, D., Sotomayor-Torres, C., Martinez, A. & Ahopelto, J., 17 Jul 2020, In: Physical Review Applied. 14, 1, 014054.

  Research output: Contribution to journal › Article › Scientific › peer-review
  7 Citations (Scopus)

• ePIXfab: The silicon photonics platform

  Khanna, A., Drissi, Y., Dumon, P., Baets, R., Absil, P., Pozo, J., Lo Cascio, D. M. R., Fournier, M., Fedeli, J-M., Fulbert, L., Zimmermann, L., Tillack, B., Aalto, T., O'Brien, P., Deptuck, D., Xu, J. & Gale, D., 2013, Integrated Photonics: Materials, Devices, and Applications II. Fedeli, J-M., Vivien, L. & Smit, M. K. (eds.). International Society for Optics and Photonics SPIE, 87670H. (Proceedings of SPIE, Vol. 8767).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review
  8 Citations (Scopus)

• Ultra-low loss waveguide platform in silicon photonics

  Bera, A., Marin, Y., Harjanne, M., Cherchi, M. & Aalto, T., 5 Mar 2022, Silicon Photonics XVII. Reed, G. T. & Knights, A. P. (eds.). International Society for Optics and Photonics SPIE, 6 p. 1200603. (Proceedings of SPIE - The International Society for Optical Engineering, Vol. 12006).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review
  3 Citations (Scopus)

• Open-Access Silicon Photonics Platforms in Europe

  Rahim, A., Goyvaerts, J., Szelag, B., Fedeli, J. M., Absil, P., Aalto, T., Harjanne, M., Littlejohns, C. G., Reed, G. T., Winzer, G., Lischke, S., Lars, Z., Knoll, D., Geuzebroek, D., Leinse, A., Geiselmann, M., Zervas, M., Jans, H., Stassen, A., Dominguez, C., & 5 othersMunoz, P., Domenech, D., Giesecke, A. L., Lemme, M. C. & Baets, R., 1 Sep 2019, In: IEEE Journal of Selected Topics in Quantum Electronics. 25, 5, 8712400.

  Research output: Contribution to journal › Article › Scientific › peer-review
  51 Citations (Scopus)

• Polarization splitters for micron-scale silicon photonics

  Shahwar, D., Cherchi, M., Harjanne, M., Kapulainen, M. & Aalto, T., 2021, Silicon Photonics XVI. Reed, G. T. & Knights, A. P. (eds.). International Society for Optics and Photonics SPIE, 1169104. (Proceedings of SPIE - The International Society for Optical Engineering, Vol. 11691).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review
  1 Citation (Scopus)

• Filtering on a micron-scale silicon photonics platform

  Cherchi, M., Harjanne, M., Ylinen, S., Kapulainen, M. & Aalto, T., 2013, IEEE 10th International Conference on Group IV Photonics, GFP 2013. IEEE Institute of Electrical and Electronic Engineers, p. 25-26

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

• Optical interconnects based on VCSELs and low-loss silicon photonics

  Aalto, T., Harjanne, M., Karppinen, M., Cherchi, M., Sitomaniemi, A., Ollila, J., Malacarne, A. & Neumeyr, C., 1 Jan 2018, Optical Interconnects XVIII. International Society for Optics and Photonics SPIE, 1053816. (Proceedings of SPIE, Vol. 10538).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review
  3 Citations (Scopus)

• Fabrication tolerant polarization splitters for micron-scale silicon photonics: Master's thesis

  Shahwar, D., 23 Jul 2019, University of Eastern Finland.

  Research output: Thesis › Master's thesis

• 1.3μm u-bend traveling wave SOA devices for high efficiency coupling to silicon photonics

  Viheriälä, J., Tuorila, H., Zia, N., Cherchi, M., Aalto, T. & Guina, M., 4 Mar 2019, Silicon Photonics XIV. Reed, G. T. & Knights, A. P. (eds.). International Society for Optics and Photonics SPIE, 7 p. 109230E. (Proceedings of SPIE, Vol. 10923).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

• Development of optical phased arrays in a micron-scale silicon photonics platform

  Muntaha, S. T., Hokkanen, A., Harjanne, M., Cherchi, M., Suopajärvi, P., Karvinen, P., Pekkarinen, M., Roussey, M. & Aalto, T., 5 Mar 2022, Integrated Optics: Devices, Materials, and Technologies XXVI. Garcia-Blanco, S. M. & Cheben, P. (eds.). International Society for Optics and Photonics SPIE, 7 p. 120040W. (Proceedings of SPIE - The International Society for Optical Engineering, Vol. 12004).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

• Supporting quantum technologies with a micron-scale silicon photonics platform

  Cherchi, M., Bera, A., Kemppinen, A., Nissilä, J., Tappura, K., Caputo, M., Lehtimäki, L., Lehtinen, J., Govenius, J., Prunnila, M. & Aalto, T., 2022, Integrated Optics: Devices, Materials, and Technologies XXVI. Garcia-Blanco, S. M. & Cheben, P. (eds.). International Society for Optics and Photonics SPIE, 17 p. 120040A. (Proceedings of SPIE - The International Society for Optical Engineering, Vol. 12004).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

• Integration of 2D and 3D nanostructure fabrication with wafer-scale microelectronics: Photonic crystals and graphene: Dissertation

  Arpiainen, S., 2015, Espoo: VTT Technical Research Centre of Finland. 78 p.

  Research output: Thesis › Dissertation › Collection of Articles

  Open Access

• Micron-scale silicon photonics with multi-mode interference couplers for chiral spirals and flat-top filters

  Aalto, T., Cherchi, M., Ylinen, S., Kapulainen, M. & Harjanne, M., 2015, Northern Optics & Photonics 2015. University of Eastern Finland, 33

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific

• Silicon photonics for optical connectivity: Small footprint with large dimensions

  Aalto, T., Cherchi, M., Harjanne, M., Ylinen, S. & Kapulainen, M., 1 Jan 2015, 2015 IEEE Optical Interconnects Conference (OI). IEEE Institute of Electrical and Electronic Engineers, p. 40-41 2 p. 7115676

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review
  5 Citations (Scopus)

• Heterogeneous integration of VCSELs on 3 μm SOI silicon photonics platform with up-reflecting mirrors

  Delrosso, G., Lee, J-W., Wälchli, B., Bhat, S., Neumeyr, C. & Aalto, T., 5 Mar 2022, Optical Interconnects XXII. Chen, R. T. & Schroder, H. (eds.). International Society for Optics and Photonics SPIE, 9 p. 120070J. (Proceedings of SPIE - The International Society for Optical Engineering, Vol. 12007).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

• Polarization-independent, low-loss and micro-scale silicon photonics for high-dense GPON OLT application

  Fu, S., Man, J., Zhang, Q., Li, Z., Cherchi, M., Sun, F., Karppinen, M. & Zeng, L., 2016, Asia Communications and Photonics Conference 2016. Optical Society of America OSA, AF4F.1

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

  Open Access

• GaSb diode lasers tunable around 2.6 μm using silicon photonics resonators or external diffractive gratings

  Ojanen, S. P., Viheriälä, J., Cherchi, M., Zia, N., Koivusalo, E., Karioja, P. & Guina, M., 27 Feb 2020, In: Applied Physics Letters. 116, 8, 081105.

  Research output: Contribution to journal › Article › Scientific › peer-review

  Open Access
  5 Citations (Scopus)

• Development and scalability of a 2 Tb/s data transmission module based on a3 μm SOI silicon photonics platform

  Delrosso, G. & Bhat, S., 2020, 22nd International Conference on Transparent Optical Networks (ICTON 2020). IEEE Institute of Electrical and Electronic Engineers, 5 p. (International Conference on Transparent Optical Networks, Vol. 22).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review
  4 Citations (Scopus)

• Precise length definition of active GaAs-based optoelectronic devices for low-loss silicon photonics integration

  Tuorila, H., Viheriälä, J., Zia, N., Cherchi, M., Harjanne, M., Isoaho, R., Aalto, T. & Guina, M., 15 Feb 2020, In: Optics Letters. 45, 4, p. 943-946 4 p.

  Research output: Contribution to journal › Article › Scientific › peer-review
  1 Citation (Scopus)

• Semiconductor Optical Amplifier with U-bend Geometry for Simplified Coupling to Silicon Photonics Waveguides

  Tuorila, H., Viheriälä, J., Cherchi, M., Aho, A., Aalto, T. & Guina, M., 15 Nov 2018, 2018 European Conference on Optical Communication, ECOC 2018. IEEE Institute of Electrical and Electronic Engineers, 8535103

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

• GaSb-based 2.55 µm external cavity diode lasers employing ruled diffraction gratings and external silicon photonics vernier reflectors

  Ojanen, S. P., Viheriälä, J., Cherchi, M., Zia, N., Koivusalo, E., Karioja, P. & Guina, M., 1 Jan 2019, 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). IEEE Institute of Electrical and Electronic Engineers, 1 p. (Optics InfoBase Conference Papers).

  Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Scientific

• Launching of multi-project wafer runs in ePIXfab with micron-scale silicon rib waveguide technology

  Aalto, T., Cherchi, M., Harjanne, M., Ylinen, S., Kapulainen, M. & Vehmas, T., 2014, Silicon Photonics IX. Kubby, J. & Reed, G. T. (eds.). International Society for Optics and Photonics SPIE, 899003. (Proceedings of SPIE, Vol. 8990).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review
  6 Citations (Scopus)

• Long-wavelength InP VCSEL exploitation for innovative sustainable high-capacity transmitter

  Gatto, A., Parolari, P., Neumeyr, C., Delrosso, G., Bhat, S., Moreolo, M. S., Parladori, G. & Boffi, P., 2021, Photonische Netze: Beiträge der 22. ITG-Fachtagung. VDE Verlag, p. 84-87 (ITG-Fachbericht, Vol. 297).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

• Flat-top interleavers based on single MMIs

  Cherchi, M., Sun, F., Kapulainen, M., Harjanne, M. & Aalto, T., 2020, Silicon Photonics XV. Reed, G. T. & Knights, A. P. (eds.). Bellingham: International Society for Optics and Photonics SPIE, 112850G. (Proceedings of SPIE, Vol. 11285).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review
  2 Citations (Scopus)

• Erratum: Wavelength-flattened directional couplers: a geometrical approach (Appl. Opt. (2003) 42 (7141–7148) DOI: 10.1364/AO.42.007141)

  Cherchi, M., 28 Feb 2022, In: Applied Optics. 61, 7, p. 1757 1 p.

  Research output: Contribution to journal › Article › Scientific › peer-review

  Open Access

• Chiral spiral waveguides based on MMI crossings: Theory and experiments

  Cherchi, M., Ylinen, S., Harjanne, M., Kapulainen, M., Vehmas, T. & Aalto, T., 1 Jan 2016, Silicon Photonics XI. Reed, G. T. & Knights, A. P. (eds.). International Society for Optics and Photonics SPIE, 975215. (Proceedings of SPIE, Vol. 9752).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

• Amorphous silicon waveguide escalator: Monolithic integration of active components on 3 μm SOI platform

  Bera, A., Cherchi, M., Tappura, K., Heimala, P. & Aalto, T., 2020, Silicon Photonics XV. Reed, G. T. & Knights, A. P. (eds.). International Society for Optics and Photonics SPIE, 1128507. (Proceedings of SPIE, Vol. 11285).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review
  1 Citation (Scopus)

• Flat-top MZI filters: A novel robust design based on MMI splitters

  Cherchi, M., Harjanne, M., Ylinen, S., Kapulainen, M., Vehmas, T. & Aalto, T., 1 Jan 2016, Silicon Photonics XI. Reed, G. T. & Knights, A. P. (eds.). International Society for Optics and Photonics SPIE, 975210. (Proceedings of SPIE, Vol. 9752).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

  Open Access
  5 Citations (Scopus)

• Room-Temperature Silicon Platform for GHz-Frequency Nanoelectro-Opto-Mechanical Systems

  Navarro-Urrios, D., Colombano, M. F., Arregui, G., Madiot, G., Pitanti, A., Griol, A., Makkonen, T., Ahopelto, J., Sotomayor-Torres, C. M. & Martínez, A., 16 Feb 2022, In: ACS Photonics. 9, 2, p. 413-419 7 p.

  Research output: Contribution to journal › Article › Scientific › peer-review

• Autocorrective interferometers for photonic integrated circuits: Invited paper

  Cherchi, M., 5 Mar 2022, Smart Photonic and Optoelectronic Integrated Circuits 2022. He, S., He, S. & Vivien, L. (eds.). International Society for Optics and Photonics SPIE, 14 p. 1200507. (Proceedings of SPIE - The International Society for Optical Engineering, Vol. 12005).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

• Fabrication tolerant flat-top interleavers

  Cherchi, M., Sun, F., Kapulainen, M., Vehmas, T., Harjanne, M. & Aalto, T., 1 Jan 2017, Silicon Photonics XII. Knights, A. P. & Reed, G. T. (eds.). International Society for Optics and Photonics SPIE, 101080V. (Proceedings of SPIE, Vol. 10108).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review
  6 Citations (Scopus)

• Second order add/drop filter with a single ring resonator

  Cherchi, M., Sun, F., Kapulainen, M., Vehmas, T., Harjanne, M. & Aalto, T., 1 Jan 2017, Silicon Photonics XII. Knights, A. P. & Reed, G. T. (eds.). International Society for Optics and Photonics SPIE, 101080B. (Proceedings of SPIE, Vol. 10108).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review
  2 Citations (Scopus)

• Data Transmission at1.3 μmUsing Hybrid Integrated Silicon Interposer and GalnNAs/GaAs Electroabsorption Modulator

  Guina, M., Sheehan, R. N., Isoaho, R., Viheriälä, J., Harjanne, M., Malacarne, A., Falconi, F., Aalto, T. & Peters, F. H., 2018, 2018 European Conference on Optical Communication, ECOC 2018. IEEE Institute of Electrical and Electronic Engineers, 8535166

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

• MMI resonators based on metal mirrors and MMI mirrors: An experimental comparison

  Cherchi, M., Ylinen, S., Harjanne, M., Kapulainen, M. & Aalto, T., 9 Mar 2015, In: Optics Express. 23, 5, p. 5982-5993

  Research output: Contribution to journal › Article › Scientific › peer-review

  Open Access
  8 Citations (Scopus)

• Data transmission at 1300 nm using optical interposer comprising hybrid integrated silicon waveguide and dilute nitride electroabsorption modulator

  Sheehan, R. N., Guina, M., Viheriälä, J., Isoaho, R., Harjanne, M., Azarello, F., Yang, M., Malacarne, A., Aalto, T. & Peters, F. H., 24 Dec 2018, In: Optics Express. 26, 26, p. 34336-34345 10 p.

  Research output: Contribution to journal › Article › Scientific › peer-review

  Open Access
  3 Citations (Scopus)

• Monolithic integration of up to 40 GHz Ge photodetectors in 3μm SOI

  Vehmas, T., Kapulainen, M., Heimala, P., Delrosso, G., Sun, F., Gao, F. & Aalto, T., 2020, Silicon Photonics XV. Reed, G. T. & Knights, A. P. (eds.). International Society for Optics and Photonics SPIE, 112850V. (Proceedings of SPIE, Vol. 11285).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review
  4 Citations (Scopus)

• Low-loss spiral waveguides with ultra-small footprint on a micron scale SOI platform

  Cherchi, M., Ylinen, S., Harjanne, M., Kapulainen, M., Vehmas, T. & Aalto, T., 2014, Silicon Photonics IX. Kubby, J. & Reed, G. T. (eds.). International Society for Optics and Photonics SPIE, 899005. (Proceedings of SPIE, Vol. 8990).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review
  22 Citations (Scopus)

• The Euler bend: Paving the way for high-density integration on micron-scale semiconductor platforms

  Cherchi, M., Ylinen, S., Harjanne, M., Kapulainen, M., Vehmas, T. & Aalto, T., 2014, Silicon Photonics IX. Kubby, J. & Reed, G. T. (eds.). International Society for Optics and Photonics SPIE, 899004. (Proceedings of SPIE, Vol. 8990).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review
  19 Citations (Scopus)

• Experimental demonstration of chiral spiral waveguides without waveguide crossings

  Aalto, T., Cherchi, M., Ylinen, S., Kapulainen, M., Harjanne, M. & Vehmas, T., 2015, 2015 European Conference on Lasers and Electro-Optics: European Quantum Electronics Conference. Optical Society of America OSA, CH_6_1

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

• Fabrication-tolerant optical filters for dense integration on a micron-scale SOI platform

  Cherchi, M., Ylinen, S., Harjanne, M., Kapulainen, M., Vehmas, T., Aalto, T., Kanellos, G. T., Fitsios, D. & Pleros, N., 2014, Silicon Photonics IX. Kubby, J. & Reed, G. T. (eds.). International Society for Optics and Photonics SPIE, 89900F. (Proceedings of SPIE, Vol. 8990).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review
  6 Citations (Scopus)

• Optical Fiber

  Aalto, T., 27 Dec 2007, IPC No. G02B 6/ 24 A I, Patent No. US2007297738, Priority date 9 Jul 2004, Priority No. WO2004FI00444

  Research output: Patent › Patent