Fiber Optics - Switches, Multiplexers, Demultiplexers

Image	Part Number	Description / PDF	Quantity	Rfq
	FWSF-M/D-8 Finisar Corporation	MUX/DEMUX RACK MOUNT OPTICAL	0
	FWSF-M/D-1550/CWDM Finisar Corporation	TXRX CWDM PLUGIN SC CONNECTOR	0
	FWSF-OADM-1-47-LC Finisar Corporation	TXRX CWDM LF 1CH 1471NM LC CONN	0
	FWSF-M/D-1310/CWDM-LC Finisar Corporation	TXRX CWDM PLUGIN LC CONNECTOR	0
	FWSFOADMD15858 Finisar Corporation	TXRX DWDM 100GHZ PLUGIN 1CH SC	0
	FWSF-OADM-1-61-LC Finisar Corporation	TXRX CWDM LF 1CH 1611NM LC CONN	0
	FWSF-M/D-1550/CWDM-2-LC Finisar Corporation	TXRX CWDM PLUGIN SC CONNECTOR	0
	FWSF-OADM-1-51 Finisar Corporation	TXRX CWDM LF 1CH 1511NM SC CONN	0
	FWSF-M/D-8-LC Finisar Corporation	TXRX CWDM LF PLUGIN LC CONNECTOR	0
	FWSF-M/D-4-2-LC Finisar Corporation	TXRX CWDM LF PLUGIN LC CONNECTOR	0
	FWSF-OADM-4-2-LC Finisar Corporation	TXRX CWDM LF 4CH 1491NM LC CONN	0
	FWSF-M/D-4-EX Finisar Corporation	TXRX CWDM PLUGIN SC CONNECTOR	0
	FWSF-M/D-1310/CWDM-4-LC Finisar Corporation	TXRX CWDM PLUGIN LC CONNECTOR	0
	FWSF-M/D-W/TAP-8-LC Finisar Corporation	TXRX CWDM LF PLUGIN LC CONNECTOR	0
	FWSF-M/D-1310/CWDM Finisar Corporation	TXRX CWDM PLUGIN SC CONNECTOR	0
	FWSF-OADM-1-53 Finisar Corporation	TXRX CWDM LF 1CH 1531NM SC CONN	0
	FWSF-OADM-1-59-LC Finisar Corporation	TXRX CWDM LF 1CH 1591NM LC CONN	0
	FWSF-M/D-4-2 Finisar Corporation	TXRX CWDM LF PLUGIN SC CONNECTOR	0
	FWSFMDMUXD82128 Finisar Corporation	TXRX DWDM 100GHZ PLUGIN 8CH SC	0
	FWSF-OADM-1-55-LC Finisar Corporation	TXRX CWDM LF 1CH 1551NM LC CONN	0

Fiber Optics - Switches, Multiplexers, Demultiplexers

1. Overview

Fiber optic switches, multiplexers, and demultiplexers are critical components in optical communication systems. These devices enable signal routing, wavelength management, and network reconfiguration. Switches direct optical signals between different fiber paths, while multiplexers combine multiple signals into a single channel and demultiplexers separate them. Their integration has revolutionized telecommunications, data centers, and sensing systems by enabling high-speed, scalable, and reliable optical networks.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
Optical Switches	Mechanical, MEMS, or electro-optic devices for routing signals	Network redundancy systems, optical cross-connects
WDM Multiplexers	Combine wavelengths using thin-film filters or arrayed waveguides	Telecom backbone networks (1310/1550 nm systems)
DWDM Demultiplexers	High-resolution wavelength separation (0.8 nm spacing)	Long-haul fiber optic transmission systems
OTDM Devices	Time-domain signal aggregation/distribution	Ultra-high-speed data transmission (100Gbps+)

3. Structure and Components

Typical structures include: - Optical Switches: Input/output ports, actuation mechanism (piezoelectric, thermal, or magnetic), and control circuitry - Multiplexers: Wavelength-selective filters (dielectric coatings, fiber Bragg gratings), fused biconical taper couplers - Demultiplexers: Arrayed waveguide gratings (AWG), diffraction gratings, or prisms for spectral separation All devices use precision fiber alignment structures and often incorporate thermoelectric stabilization for wavelength accuracy.

4. Key Technical Specifications

Parameter	Importance
Insertion Loss (0.2-3.0 dB)	Directly affects signal strength and system SNR
Wavelength Accuracy ( 0.1 nm)	Ensures proper channel alignment in WDM systems
Switching Speed (ms to s range)	Critical for network protection and dynamic reconfiguration
Port Count (1x2 to 1x20+)	Determines system scalability and complexity
Return Loss (>45 dB)	Minimizes backreflection-induced signal distortion

5. Application Fields

Telecommunications (DWDM networks, optical add-drop multiplexers)
Data Centers (high-density optical interconnects)
Medical Imaging (OCT systems using swept-source multiplexing)
Industrial Sensing (distributed fiber optic sensors)
Broadcast Systems (video signal aggregation)

6. Leading Manufacturers and Products

Manufacturer	Representative Product
Finisar (II-VI)	WSS-1x20 wavelength selective switch
Lumentum	DWDM Mux/DeMux with 50 GHz spacing
Huawei	OptiX OSN optical cross-connect system
Thorlabs	MEMS-based optical switch matrix
NeoPhotonics	High-speed OTDM modulator modules

7. Selection Guidelines

Key considerations: - Match wavelength range (1310/1550 nm standard vs. CWDM/DWDM systems) - Evaluate port configuration and scalability requirements - Consider environmental stability (temperature, vibration tolerance) - Balance insertion loss vs. switching speed trade-offs - Verify compatibility with existing fiber types (SMF, MMF, PMF) - Assess long-term reliability (MTBF >100,000 hours typical)

8. Industry Trends

Future developments include: - Miniaturization through silicon photonics integration - AI-driven dynamic wavelength management systems - Increased port counts (>1000 ports) for hyperscale data centers - Enhanced thermal stability for 5G transport networks - Convergence of switching and multiplexing functions in photonic integrated circuits (PICs) - Adoption of quantum dot-based wavelength filters for improved spectral efficiency