Coreray: Leading Fiber Optic Switch Manufacturer - MEMS & Mechanical Optical Solutions

    The Coreray PMOSW-1×4-1550-N-1-5-8-FA is a high-performance 1x4 polarization maintaining optical switch designed for 1550nm optical communication systems. Developed and manufactured by Guangxi Coreray, this advanced fiber optic switch utilizes precision relay-driven technology to deliver reliable optical path switching while maintaining signal polarization integrity.

    This polarization-maintaining switch employs PM1550 fiber to ensure stable polarization state transmission, effectively reducing polarization-dependent loss (PDL). With its compact dimensions of just 33×26×8.5mm, this optical switch is perfect for space-constrained applications in data centers, test equipment, and outdoor telecommunications infrastructure.

    The 5V non-latching control mechanism enables low power consumption and compatibility with standard control circuits, while FC/APC connectors provide excellent return loss performance. Each unit features 0.75m yellow-jacketed pigtails with 0.9mm loose tube protection for enhanced durability in field deployments.

Key Features

• High-Precision Polarization Maintenance: PM1550 fiber ensures stable polarization transmission, preventing signal distortion in sensitive applications like fiber sensing and coherent communications.

• Ultra-Low Insertion Loss: Only 1.5dB typical insertion loss—significantly better than industry average (typically 2.0dB+)—ensuring long-distance transmission quality.

• Industrial-Grade Reliability: Passes -40℃ to +85℃ temperature cycling tests; operates reliably from -20℃ to 70℃ in harsh environments including outdoor base stations and power monitoring stations.

• Plug-and-Play Friendly: 5V non-latching drive compatible with mainstream control circuits; FC/APC connectors minimize back reflections and reduce system noise.

• Compact and Lightweight: 33×26×8.5mm miniature package saves equipment space, ideal for integrated test platforms and high-density deployments.

Technical Specifications

Application Areas

• Fiber Optic Sensing Systems: Enables signal channel switching for multi-point data acquisition in structural monitoring, perimeter security, and oil & gas exploration.

• Coherent Optical Communication Equipment: Perfectly matched for 1550nm coherent transmission scenarios, minimizing signal interference and maintaining phase integrity.

• Optical Test Instruments: Serves as a core switching component in automated test systems, improving testing efficiency and accuracy.

• Backbone Optical Transmission Networks: Meets signal routing requirements for high-density nodes in metropolitan and long-haul networks.

• Data Center Optical Interconnects: Supports low-power, compact deployment requirements for modern data center architectures.

Operating Principle

The PMOSW-1×4-1550 polarization-maintaining optical switch combines precision optical switching with advanced polarization maintenance technology:

Optical Path Switching Mechanism

This mechanical optical switch operates with a 5V non-latching drive. The core switching principle involves electromagnetic actuation controlling a precision micro-mirror or prism. When a 5V pulse is applied, the drive mechanism moves the optical element to the specified position, directing the input signal to one of four output ports. After switching, no power is required to maintain the state (non-latching characteristic), effectively reducing power consumption.

Polarization Maintenance Core Technology

The polarization-maintaining function relies on PM1550 fiber's special stress-bar structure:

• Stress Rod Design: Symmetrically embedded cylindrical stress rods create the classic "panda-eye" structure

• Birefringence Effect: Thermal expansion differences between stress rods and core create strong birefringence

• Polarization Holding: When input light aligns with the fiber's fast or slow axis, signals propagate stably while orthogonal polarization components are strongly suppressed

Critical Alignment Technology

To ensure complete polarization transmission, precision key alignment is employed:

• Connector key aligned strictly with PM fiber stress rods ("panda eyes")

• Alignment angle error controlled within ±2° ensuring extinction ratio ≥25dB

• FC/APC connector's 8° angled polish further reduces return loss (≥55dB)

Performance Assurance

• Beat length optimized for enhanced polarization holding capability

• Stable birefringence characteristics across -20℃ to 70℃ operating range

• Precision collimators and multi-layer coating technology keep insertion loss ≤1.5dB

This design ensures that in polarization-sensitive applications like fiber sensing and 5G testing, the product achieves fast optical switching (<5ms) while maintaining signal polarization integrity—meeting the demanding requirements of high-precision optical systems.

Handling and Operating Precautions

• Ensure drive voltage is exactly 5V; excessive voltage may damage the device

• Keep connector end-faces clean when connecting or disconnecting fibers

• Maintain operating temperature within -20℃ to +70℃ range

• Avoid bending pigtails less than 30mm radius to prevent excess loss

• Device is ESD-sensitive; observe anti-static precautions during handling

• For long-term storage, keep in dry, clean environment with protective caps installed