WDM Multiplexers & Filters

This high-power isolator operates at 1064nm, ensuring efficient optical signal transmission. With a 2W capacity, it guarantees reliable isolation for your optical systems. Ideal for industrial and research applications.

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Product Description

The WDM Multiplexers Filters are versatile optical components designed to combine or separate multiple wavelength channels in fiber optic systems, supporting both coarse (CWDM) and dense (DWDM) wavelength division multiplexing. Engineered with thin-film filter (TFF) or arrayed waveguide grating (AWG) technology, they offer high channel isolation, low insertion loss, and wide wavelength coverage. Available in 2-port (mux/demux), 4-port (bidirectional), and N-port configurations, these filters are ideal for maximizing bandwidth utilization in telecom, datacom, and sensor networks.

Features

TFF CWDM: Supports 18 channels (1270–1610 nm, 20 nm spacing), insertion loss ≤1.5 dB, isolation ≥30 dB.

AWG DWDM: Supports 40+ channels (1525–1565 nm, 0.8 nm spacing), insertion loss ≤3.0 dB, isolation ≥25 dB.

Low Polarization Dependence: PDL ≤0.5 dB for CWDM, ≤1.0 dB for DWDM, ensuring consistent performance across all polarization states.

Wide Power Handling: Supports up to 30 dBm (1 W) CW for pump wavelengths, with thermal coatings for high-power applications.

Flexible Packaging: Available in module (with connectors), rack-mount, or miniaturized chip formats for diverse system requirements.

Environmental Stability: Operates in humidity up to 95% (non-condensing) and meets Telcordia GR-1221 for reliability.

Applications

Telecom Networks: Increases capacity in long-haul and metro networks by multiplexing multiple 10G/100G signals over a single fiber.

Data Centers: Enables high-density wavelength routing in 400G/800G optical interconnects, reducing fiber usage and cabling complexity.

Fiber Sensing: Combines multiple FBG sensor signals at different wavelengths for distributed temperature/strain monitoring in smart grids and pipelines.

Optical Amplifiers: Separates pump light (980 nm/1480 nm) from signal light (1550 nm) in EDFAs and Raman amplifiers.

Industrial Optics: Routes multiple laser wavelengths in material processing systems for multi-function cutting, welding, and marking.

Faq

Q: What is the difference between CWDM and DWDM?

A: CWDM uses wider channel spacing (20 nm) for lower cost and simpler design, while DWDM uses narrow spacing (0.8 nm) for higher channel density.

Q: Can I mix CWDM and DWDM channels in the same system?

A: No, they require different filter technologies; hybrid systems use cascaded CWDM and DWDM modules.

Q: How does channel spacing affect insertion loss?

A: Narrower spacing (DWDM) increases loss slightly due to tighter filter tolerances; typical loss is ≤3 dB for 40-channel AWG modules.

Q: Is wavelength reconfigurability supported?

A: Standard models are fixed-wavelength; reconfigurable optical add-drop multiplexers (ROADMs) offer dynamic wavelength switching.

Q: What is the typical lifespan under continuous operation?

A: ≥100,000 hours with proper thermal management, backed by a 5-year warranty for commercial models.

Item	Details
Product Series	WDM Multiplexers & Filters
Supported Bands	980/1064nm, 1550/980nm, 1550/1064nm, etc.
Package Types	φ3×54mm, φ3×60mm, ABS box, etc.
Fiber Types	PM Panda fiber, bare fiber or 900μm tubing
Key Advantages	Low IL, high isolation, high RL, low thermal drift, excellent channel uniformity
Applications	CATV, GPON/EPON, DWDM/CWDM modules, fiber lasers
Customization	Wavelength, axis orientation, package, connector type
Purchasing Note	Connectors may increase IL and reduce RL; standard power <0.5W; alignment to slow axis required

Spec Sheet Summary (Extracted from Manual Pages 21–30)

Model	Type	Wavelength T/R (nm)	IL (dB)	ISO (dB)	RL (dB)	Notes
KHPMFWDM-5506	PM Filter WDM (980/1064)	T: 1550, R: 1064	0.8 / 0.6	25 / 15	≥50	φ3×54mm, 0.5W
KHPMFWDM-0698	PM Filter WDM (1064/980)	T: 1064, R: 980	0.8 / 0.6	25 / 15	≥50	φ3×54mm, 0.5W
KHPMCWDM-27	PM CWDM	1270/1610 (20nm spacing)	≤0.6	≥30	≥50	±6.5nm bandwidth
KHPMDWDM-26	PM DWDM	ITU grid	≤1.0	≥30	≥50	50–200GHz channel spacing
KHPMCWM-108	PM CWDM Module (1×8)	1260–1620nm	≤2.6	≥30	≥50	ABS box, dual-axis
KHPMDWDM-Mini	Mini Size PM DWDM	ITU grid	≤1.0	≥30	≥50	φ3.2×30mm
KHPMCWM-Mini	Mini Size PM CWDM	ITU grid	≤0.9	≥30	≥50	φ3.2×30mm
KHPMFWDM-9855	High Power Filter WDM (980/1550)	T: 1550, R: 980	0.7 / 0.5	30 / 15	≥50	φ3×60mm, 3W
KHPMFWDM-0655	High Power Filter WDM (1064/1550)	T: 1550, R: 1064	0.8 / 0.6	25 / 15	≥50	φ3×60mm

Packaging Options

Structure Type	Package Code	Size (mm)	Fiber Type	Mounting Type
In-line type	φ3×54	Ø3 × 54	PM Panda fiber	Bare fiber
High-power version	φ3×60	Ø3 × 60	PM fiber (up to 3W)	Metal tube
Mini CWDM/DWDM	φ3.2×30	Ø3.2 × 30	PM fiber	Compact casing
CWDM/DWDM Module	ABS box	100 × 80 × 10	PM / SM fiber	Slot mountable

Order Guide

Format Example	Description
KHPMFWDM-λ1λ2-Config-P-F-Conn	KHPMFWDM-5506-3PM-0.5W-FC/APC
KHPMCWDM-nCh-Spacing-P-F-Conn	KHPMCWDM-1x8-20nm-ABS-3PM-FC/UPC
KHPMDWDM-ITUgrid-Spacing-P-F-Conn	KHPMDWDM-C20-100GHz-3PM-FC/APC

❓ Frequently Asked Questions (FAQ)

Question	Answer
What’s the max power supported?	Standard: <0.5W, high power version: up to 3W
Can I customize the center wavelength?	Yes, customizable between 980–1650nm
Are single- or dual-axis versions available?	Yes, default blocks fast axis; dual-axis optional
Do connectors affect performance?	Yes, connectors increase IL and lower RL slightly
Can it be used before fiber lasers?	Yes, widely used for pump/Raman laser coupling