Passively aligned fiber-optic transmitter integrated into LTCC module

Mikko Karppinen, Kari Kautio, Mikko Heikkinen, Jonna Häkkilä, Pentti Karioja, Tomi Jouhti, Ari Tervonen, Markku Oksanen

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    Abstract

    We studied the possibilities of LTCC (low temperature cofired ceramics) technology to fabricate transmitter arrays equipped with vertical-mounted multimode fiber pigtails. The developed LTCC module can be mounted vertically on a printed-circuit-board (PCB), thus providing small, essentially one-dimensional PCB footprint. The fiber is aligned and supported using a hole structure through the layers, and the surface-emitting source, such as a VCSEL, is flip-chipped on the other side of the substrate. Thus, this kind of module can be used as a detachable electrical interface between the fiber-optic and electronic media. To evaluate the feasibility of the system, a 5-channel transmitter based on a 4-layer LTCC substrate was designed and realized, and mounted vertically on a test board. Each transmitter, sized 5 mm X 5 mm2, included VCSEL and laser-driver chips as well as discrete passives. 62.5/125-micron fibers were used with metallic tubes as strain relieves. Before implementation, the optical alignment tolerances were examined by measurements and simulations, and the tolerances of fiber-mounting holes were evaluated by preparing test structures. The fiber alignment accuracy seemed adequate even for the first transmitter prototypes. Nevertheless, stringent requirements for the LTCC process control are necessary to achieve the needed accuracy.
    Original languageEnglish
    Title of host publicationMicro- and Nano-optics for Optical Interconnection and Information
    Place of PublicationBellligham, Washington, US
    PublisherInternational Society for Optics and Photonics SPIE
    Pages293-302
    Publication statusPublished - 2001
    MoE publication typeA4 Article in a conference publication
    EventInternational Symposium on Optical Science and Technology - San Diego, United States
    Duration: 29 Jul 200131 Jul 2001

    Publication series

    SeriesProceedings of SPIE
    Volume4455

    Conference

    ConferenceInternational Symposium on Optical Science and Technology
    CountryUnited States
    CitySan Diego
    Period29/07/0131/07/01

    Fingerprint

    transmitters
    fiber optics
    modules
    ceramics
    fibers
    printed circuits
    circuit boards
    alignment
    footprints
    mounting
    chips
    prototypes
    tubes
    requirements
    electronics
    lasers
    simulation

    Cite this

    Karppinen, M., Kautio, K., Heikkinen, M., Häkkilä, J., Karioja, P., Jouhti, T., ... Oksanen, M. (2001). Passively aligned fiber-optic transmitter integrated into LTCC module. In Micro- and Nano-optics for Optical Interconnection and Information (pp. 293-302). Bellligham, Washington, US: International Society for Optics and Photonics SPIE. Proceedings of SPIE, Vol.. 4455
    Karppinen, Mikko ; Kautio, Kari ; Heikkinen, Mikko ; Häkkilä, Jonna ; Karioja, Pentti ; Jouhti, Tomi ; Tervonen, Ari ; Oksanen, Markku. / Passively aligned fiber-optic transmitter integrated into LTCC module. Micro- and Nano-optics for Optical Interconnection and Information . Bellligham, Washington, US : International Society for Optics and Photonics SPIE, 2001. pp. 293-302 (Proceedings of SPIE, Vol. 4455).
    @inproceedings{fd443fda9c5b4873b12538ce70e76874,
    title = "Passively aligned fiber-optic transmitter integrated into LTCC module",
    abstract = "We studied the possibilities of LTCC (low temperature cofired ceramics) technology to fabricate transmitter arrays equipped with vertical-mounted multimode fiber pigtails. The developed LTCC module can be mounted vertically on a printed-circuit-board (PCB), thus providing small, essentially one-dimensional PCB footprint. The fiber is aligned and supported using a hole structure through the layers, and the surface-emitting source, such as a VCSEL, is flip-chipped on the other side of the substrate. Thus, this kind of module can be used as a detachable electrical interface between the fiber-optic and electronic media. To evaluate the feasibility of the system, a 5-channel transmitter based on a 4-layer LTCC substrate was designed and realized, and mounted vertically on a test board. Each transmitter, sized 5 mm X 5 mm2, included VCSEL and laser-driver chips as well as discrete passives. 62.5/125-micron fibers were used with metallic tubes as strain relieves. Before implementation, the optical alignment tolerances were examined by measurements and simulations, and the tolerances of fiber-mounting holes were evaluated by preparing test structures. The fiber alignment accuracy seemed adequate even for the first transmitter prototypes. Nevertheless, stringent requirements for the LTCC process control are necessary to achieve the needed accuracy.",
    author = "Mikko Karppinen and Kari Kautio and Mikko Heikkinen and Jonna H{\"a}kkil{\"a} and Pentti Karioja and Tomi Jouhti and Ari Tervonen and Markku Oksanen",
    year = "2001",
    language = "English",
    series = "Proceedings of SPIE",
    publisher = "International Society for Optics and Photonics SPIE",
    pages = "293--302",
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    Karppinen, M, Kautio, K, Heikkinen, M, Häkkilä, J, Karioja, P, Jouhti, T, Tervonen, A & Oksanen, M 2001, Passively aligned fiber-optic transmitter integrated into LTCC module. in Micro- and Nano-optics for Optical Interconnection and Information . International Society for Optics and Photonics SPIE, Bellligham, Washington, US, Proceedings of SPIE, vol. 4455, pp. 293-302, International Symposium on Optical Science and Technology, San Diego, United States, 29/07/01.

    Passively aligned fiber-optic transmitter integrated into LTCC module. / Karppinen, Mikko; Kautio, Kari; Heikkinen, Mikko; Häkkilä, Jonna; Karioja, Pentti; Jouhti, Tomi; Tervonen, Ari; Oksanen, Markku.

    Micro- and Nano-optics for Optical Interconnection and Information . Bellligham, Washington, US : International Society for Optics and Photonics SPIE, 2001. p. 293-302 (Proceedings of SPIE, Vol. 4455).

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    TY - GEN

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    AU - Karppinen, Mikko

    AU - Kautio, Kari

    AU - Heikkinen, Mikko

    AU - Häkkilä, Jonna

    AU - Karioja, Pentti

    AU - Jouhti, Tomi

    AU - Tervonen, Ari

    AU - Oksanen, Markku

    PY - 2001

    Y1 - 2001

    N2 - We studied the possibilities of LTCC (low temperature cofired ceramics) technology to fabricate transmitter arrays equipped with vertical-mounted multimode fiber pigtails. The developed LTCC module can be mounted vertically on a printed-circuit-board (PCB), thus providing small, essentially one-dimensional PCB footprint. The fiber is aligned and supported using a hole structure through the layers, and the surface-emitting source, such as a VCSEL, is flip-chipped on the other side of the substrate. Thus, this kind of module can be used as a detachable electrical interface between the fiber-optic and electronic media. To evaluate the feasibility of the system, a 5-channel transmitter based on a 4-layer LTCC substrate was designed and realized, and mounted vertically on a test board. Each transmitter, sized 5 mm X 5 mm2, included VCSEL and laser-driver chips as well as discrete passives. 62.5/125-micron fibers were used with metallic tubes as strain relieves. Before implementation, the optical alignment tolerances were examined by measurements and simulations, and the tolerances of fiber-mounting holes were evaluated by preparing test structures. The fiber alignment accuracy seemed adequate even for the first transmitter prototypes. Nevertheless, stringent requirements for the LTCC process control are necessary to achieve the needed accuracy.

    AB - We studied the possibilities of LTCC (low temperature cofired ceramics) technology to fabricate transmitter arrays equipped with vertical-mounted multimode fiber pigtails. The developed LTCC module can be mounted vertically on a printed-circuit-board (PCB), thus providing small, essentially one-dimensional PCB footprint. The fiber is aligned and supported using a hole structure through the layers, and the surface-emitting source, such as a VCSEL, is flip-chipped on the other side of the substrate. Thus, this kind of module can be used as a detachable electrical interface between the fiber-optic and electronic media. To evaluate the feasibility of the system, a 5-channel transmitter based on a 4-layer LTCC substrate was designed and realized, and mounted vertically on a test board. Each transmitter, sized 5 mm X 5 mm2, included VCSEL and laser-driver chips as well as discrete passives. 62.5/125-micron fibers were used with metallic tubes as strain relieves. Before implementation, the optical alignment tolerances were examined by measurements and simulations, and the tolerances of fiber-mounting holes were evaluated by preparing test structures. The fiber alignment accuracy seemed adequate even for the first transmitter prototypes. Nevertheless, stringent requirements for the LTCC process control are necessary to achieve the needed accuracy.

    M3 - Conference article in proceedings

    T3 - Proceedings of SPIE

    SP - 293

    EP - 302

    BT - Micro- and Nano-optics for Optical Interconnection and Information

    PB - International Society for Optics and Photonics SPIE

    CY - Bellligham, Washington, US

    ER -

    Karppinen M, Kautio K, Heikkinen M, Häkkilä J, Karioja P, Jouhti T et al. Passively aligned fiber-optic transmitter integrated into LTCC module. In Micro- and Nano-optics for Optical Interconnection and Information . Bellligham, Washington, US: International Society for Optics and Photonics SPIE. 2001. p. 293-302. (Proceedings of SPIE, Vol. 4455).