Passive components control light in a pre-determined way; their function is fixed during manufacture and cannot be changed later. Examples are collimators, isolators, circulators, fixed attenuators, polarizers, couplers, and splitters. Simple WDMs, which combine two channels of light, usually at 1310 and 1550 nm, are also included here.
These are the simplest type of components to manufacture, and have reached commodity status.
Attenuator -- reduces the intensity of the optical signal by a fixed amount
Circulator -- a multiport device that routes one incoming optical signal from port 1 to port 2 and another signal from port 2 to port 3.
Collimator -- a lens that converts light from a point source into a parallel beam
Coupler -- enables power transfer from one optical path into another
Isolator -- allows light to pass in one direction but not the other
Polarizer -- acts on light of only one polarization
Splitter -- splits the optical power from one path into two (or more) paths according to a power ratio e.g. 50:50 or 30:70
WDM (wavelength division multiplexer) -- combines or breaks apart two optical signals by wavelength, usually 1310 and 1550 nm.
Attenuators (Fixed)
- Accelink Technologies Co. Ltd.
- Alliance Fiber Optic Products, Inc. (AFOP)
- DiCon FiberOptics Inc.
- Fiber Optic Communications Inc. (FOCI)
- Gould Fiber Optics Inc.
- Hopecom Optic Communications Co. Ltd.
- JDS Uniphase Corp.
- OZ Optics Ltd.
- Senko Advanced Components
- SK Opto-Electronics Inc. (SKOE)
- Sun Telecommunication Co. Ltd.
Circulators
- Accelink Technologies Co. Ltd.
- AOC Technologies Inc.
- Alliance Fiber Optic Products, Inc. (AFOP)
- Finisar Corp.
- Fiber Optic Communications Inc. (FOCI)
- Gould Fiber Optics Inc.
- JDS Uniphase Corp.
- Koncent Communication, Inc. (Photop)
- O-Net Communications Ltd.
- Oplink Copmmunications Inc.
- Primanex Corp.
- Senko Advanced Components
- Sun Telecommunication Co. Ltd.
Collimators
- Fiber Optic Communications Inc. (FOCI)
- Koncent Communication, Inc. (Photop)
- Senko Advanced Components
- Sun Telecommunication Co. Ltd.
Isolators
- Accelink Technologies Co. Ltd.
- AOC Technologies Inc.
- Alliance Fiber Optic Products, Inc.
- DiCon FiberOptics Inc.
- Finisar Corp.
- Fiber Optic Communications Inc. (FOCI)
- Gould Fiber Optics Inc.
- Hopecom Optic Communications Co. Ltd.
- Isowave Inc.
- JDS Uniphase Corp.
- Koncent Communication, Inc. (Photop)
- LightPath Technologies Inc.
- O-Net Communications Ltd.
- Oplink Copmmunications Inc.
- Primanex Corp.
- Senko Advanced Components
- Sun Telecommunication Co. Ltd.
Polarization components
- JDS Uniphase Corp.
- Little Optics
- Phoenix Photonics Ltd.
Splitters
- Accelink Technologies Co. Ltd.
- AOC Technologies Inc.
- Alliance Fiber Optic Products, Inc.
- DiCon FiberOptics Inc.
- Fiber Optic Communications Inc. (FOCI)
- Furukawa Electric Co. Ltd.
- Gould Fiber Optics Inc.
- Hi-Optel Technology Co. Ltd.
- Hopecom Optic Communications Co. Ltd.
- JDS Uniphase Corp.
- Koncent Communication, Inc. (Photop)
- OZ Optics Ltd.
- Phoenix Photonics Ltd.
- Oplink Copmmunications Inc.
- Primanex Corp.
- Senko Advanced Components
- SK Opto-Electronics Inc. (SKOE)
- Sumitomo Electric Industries Ltd.
- Sun Telecommunication Co. Ltd.
- Teem Photonics
WDMs
