The 450/633 (450/635) nm WDM coupler, also known as a wavelength-dependent coupler or wavelength combiner/splitter, is a fused-fiber-based passive optical component in which two inputs at 450nm and 633nm (or 635nm) wavelengths from the two input ports are combined at one output port. On the other hand, if these two signals (450/633nm, or 450/635nm,) are injected into the same input port, they would separate out at the two output ports. Related Products ↓

Wavelength Division Multiplexing (WDM) Couplers

Wavelength division multiplexing (WDM) couplers, which are a specialized form of fiber coupler designed to permit a number of different peak wavelength optical signals to be transmitted in parallel on a single fiber. WDM couplers either combine the different wavelength optical signals onto the fiber (i.e. multiplex) or separate the different wavelength optical signals output from the fiber (i.e. demultiplex).
 

Fused-Fiber Based 450/633 (450/635) nm WDM Coupler

Such a 450/633 (or 450/635) nm fused-fiber-based optical WDM coupler owes its origin to the fact that for a given coupler, the coupling coefficients and the effective lengths of interaction at two different wavelengths, say 450 and 633 nm, are different. Therefore, the splitting ratios at these wavelengths are usually different. For a coupler to function as a WDM at 450/633 nm operating wavelengths, the fabrication process has to be tailored such that the splitting ratio of the device is a maximum at one wavelength and a minimum at the other wavelength. This implies that for such a 450/633 (or 450/635) nm WDM coupler, all the input power at 450nm emerges at one output port and all the input power at 633nm (or 635nm) emerges at the second output port.

 

450/633 (450/635) nm Fused Fiber WDM Coupler

 

450/633 nm and 450/635 nm Fused Fiber Optical WDM Coupler Wavelength Combiner/Splitter
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FEATURES OF 450/633 (450/635) NM WDM COUPLER

  • Low Insertion Loss
  • Low PDL
  • High Reliability and Stability
  • Customization Supported

PPLICATIONS OF 450/633 (450/635) NM WDM COUPLER

  • Fiber Amplifier
  • Instrument
  • R&D

 

450/633 (450/635) nm WDM Coupler Specifications
Port Configuration1x2 or 2x2
Operating Wavelength (nm)450 & 633, or 450 & 635
Operating Bandwidth (nm)±5
Insertion Loss (dB)≤0.6
Isolation (dB)≥18
PDL (dB)≤0.2
Return Loss (dB)≥50
Directivity (dB) ≥50
Power Handling (W)5
Fiber TypeNufern 460-HP, or others upon request
Working Temperature (°C)-5 ~ +70
Storage Temperature (°C)-40 ~ +85
Pigtail TypePackage (mm)
250μm Bare FiberSteel Tube, Φ3.0 × 54
900μm Loose TubeSteel Tube, Φ3.0 × 54
2 mm or 3 mm CableModular Box

Notes:
1. Above SPECs are are devices without connectors. The insertion loss of one pair of connector is less than 0.3 dB.
2. For CW high-power optical interconnection, we recommend fusion splice without connectors.
3. The 450/633 (450/635) nm WDM couplers are customizable and the above specifications are subject to change without notice.
4. For product customization or special requirement, please contact our sales representative.

 

Ordering Information for 450/633 (450/635) nm WDM Coupler
Fussed Fiber WDM CouplerPortWavelengthFiber TypePigtailPackagePigtail LengthConnector
1x2450/633Nufern 460-HP250 μmΦ3 × 540.50 mNone
2x2450/635Custom …900 μmModular Box1.00 mLC/UPC
2 mmCustom …Custom …LC/APC
3 mmSC/UPC
SC/APC
FC/UPC
FC/APC
Custom …