| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Karioja, Pentti
VTT Technical Research Centre of Finland
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (17/17 displayed)
- 2022Development of gradient index microlenses for the broadband infrared rangecitations
- 2014Detection of low concentration formaldehyde gas by photonic crystal sensor fabricated by nanoimprint process in polymer materialcitations
- 2014Detection of low concentration formaldehyde gas by photonic crystal sensor fabricated by nanoimprint process in polymer materialcitations
- 2012Printed hybrid systemscitations
- 2011UV-imprinting of single-mode polymeric waveguidescitations
- 2011Manipulation of optical field distribution in layered composite polymeric-inorganic waveguidescitations
- 2011Field enhancement in polymer waveguides fabricated by UV imprintingcitations
- 2010Fabrication of optical inverted-rib waveguides using UV-imprintingcitations
- 2009Hermetic fiber pigtailed laser module utilizing passive device alignment on an LTCC substratecitations
- 2009Finland-Japan Workshop on Nanophotonics and Related Technologies
- 2008Electro-optical properties of BaTiO3-SrTiO3 multilayer thin films for waveguide modulatorscitations
- 2008Electro-optical properties of BaTiO 3 -SrTiO 3 multilayer thin films for waveguide modulatorscitations
- 2007Inmould integration of a microscope add-on system to a 1.3 Mpix camera phonecitations
- 2006Fiber pigtailed multimode laser module based on passive device alignment on an LTCC substratecitations
- 2006Integrated LTCC modules by laminating and co-firing tapes directly on heat sinkcitations
- 2006Cost-efficient hermetic fibre pigtailed laser module utilizing passive device alignment on an LTCC substrate
- 2004Photo-crosslinkable hybrid material with improved aging stability for integrated optics
Places of action
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article
Fiber pigtailed multimode laser module based on passive device alignment on an LTCC substrate
Abstract
A concept that utilizes structured planar substrates based on low-temperature cofired ceramics (LTCC) as a precision platform for a miniature passive alignment multimode laser module is demonstrated. The three-dimensional shape of the laminated and fired ceramic substrate provides the necessary alignment structures including holes, grooves, and cavities for the laser-to-fiber coupling. The achieved passive alignment accuracy allows high coupling efficiency realizations of multimode fiber pigtailed laser modules. Thick-film printing and via punching can be incorporated in order to integrate electronic assemblies directly on the optomechanical platform. The platform is scalable, and it allows embedding of subsystems, such as silicon optical bench (SiOB), but it also provides the interface for larger optical systems. Temperature management of high-power laser diodes is achieved by realizing heat dissipation structures and a cooling channel into the LTCC substrate. The measured maximum laser metallization temperature was 70degC when a thermal power of 0.5 W was applied at the laser active area using a liquid cooling of 50 mL/min. The measured maximum temperature of the laser surface was about three times higher without liquid cooling. Optical coupling efficiency of the multimode laser systems was simulated using optical systems simulation software. The nominal coupling efficiency between 100times1 mum stripe laser and 62.5/125-mum graded index fiber (NA=0.275) was 0.37. The simulated coupling efficiency and alignment tolerances were verified by prototype realization and characterization. The measured alignment tolerance values between laser and fiber in AT prototype series were Deltax=7.7 mum, Deltay=7.6 mum, and Deltaz=10.8 mum (SD values). The corresponding values in A2 prototype series were Deltax=3.1 mum, Deltay=9.1 mum, and Deltaz=10.2 mum. The measured average coupling efficiency was 0.28 in AT series and 0.31 in A2 series. The coupling efficiencies of all operational prototypes varied from 0.05 to 0.43.