Impact of Passive Photonic Devices

  • Upload
    lim-hy

  • View
    222

  • Download
    0

Embed Size (px)

Citation preview

  • 8/9/2019 Impact of Passive Photonic Devices

    1/3

    Impact of passive photonic devices

    Photonic influences many aspect of our life and is one of the most important technologies

    for the 21stcentury. There are currently a lot of passive photonic devices used in industry.

    Examples of these passive photonic devices are Y-junction, directional coupler, aveguide, ring

    resonator, etc.

    Y-junction is a simple three-port device hich can operate as either a splitter or a

    com!iner. " Y-!ranch aveguide is a fundamental element for optical aveguide devices. #ince

    a Y-!ranch provide advantages such as lo excess loss, lo avelength dependent loss and lo

    polari$ation dependent loss, 1%& splitters consisting of Y-!ranches '1(-')( are no idely used

    for optical signal distri!ution in passive optical netor*s. +irectional coupler is the element

    hich has to input ports and to output ports, and is composed of to closely spaced

    aveguides. The or*ing principle of the coupler is !ased on the periodical optical poer

    exchange that occurs !eteen to adjacent aveguides through the overlapping of the

    evanescent aves of the propagating modes. " passive directional coupler measures forard and

    reflected poer and facilitates determination of voltage standing ave ratio #/0 and return

    loss. or that reason, it often is the *ey component in poer meters, antenna monitors, and

    analy$ers.

    ith appropriate design, it is possi!le to develop a platform that ena!les precise relative

    placement of components such that they are automatically aligned. This approach is commonly

    referred to as passive alignment since components do not have to !e poered nor their position

    manipulated to achieve alignment. Passive alignment is the process of aligning to or more

    optical components ithout actively monitoring the resulting output poer. ontrasted ith

    active alignment, in hich the poer of the optical signal is maximi$ed !efore the alignment is

    finali$ed. 3n silicon, precise mechanical structures can !e lithographically defined, hich guide

    components into place. Passive alignment could eventually !e used to attach an optical pumpdirectly to a silicon laser. 3n essence, passive alignment utili$es a platform and components, each

    fa!ricate ith complementary features that ena!le precise placement of the components in

    designated positions on the platform. These features may include solder !umps, mechanical

    features or optical fiducials.

  • 8/9/2019 Impact of Passive Photonic Devices

    2/3

    Passive alignment is expected to lead to significant cost reduction for those applications

    that are cost-sensitive. "lthough passive alignment technology is expected to !e important for

    individually pac*aged devices such as pigtailed lasers0, the impact ill !e even more profound

    as optoelectronic modules incorporate more complicity or more functionality. or example,

    pac*aging monolithic arrays of lasers or detectors re4uires the alignment of multiple fi!ers in

    addition to electrical 356 placement. There is also a compelling need for passive alignment in

    complex su!system that incorporate a variety of optical elements, each re4uiring alignment, on a

    common platform. Passive alignment ena!les the development of such su!systems using

    production assem!ly techni4ues already developed in the electronics industry. 7everaging such

    techni4ues reduces cost and encourages the use of optic in systems that otherise might have

    !een limited to purely electronic solutions.

    /eferences8

    1. http855!oo*s.google.com.my5!oo*s9

    id:Eatl;upg:P")??>d4:impact@of@passive@photonic@device>hl:en>ei:

    Av&mTf4u"=aecBCT2YDB>sa:oi:!oo*result>ct:result>resnum:F>ved:D+

    DGH"EI+gJKv:onepage>4>f:false

    2. http855.evaluationengineering.com5index.php5solutions5instrumentation5directional-

    poer-measurements-and-the-effects-of-directivity.html

    ). http855techresearch.intel.com5nesdetail.aspx93d:1?

    4. http855.google.com.my5url9

    sa:t>source:e!>cd:12>ved:DIJGj"I6"o>url:httpL)"L2

    L2media.iley.comL2productdataL2excerpt

  • 8/9/2019 Impact of Passive Photonic Devices

    3/3

    L2JFL2D=MDJ=JHL2D=MDJ=JHJF.pdf>rct:j>4:exampleL2DofL2Dpassive

    L2DphotonicL2Ddevice

    L2Daveguide>ei:mJ&nT!ntNo73rGfpt6)>usg:"Gj&E$4jOcFJd-

    pHiTxsJcTEpnlj">cad:rja