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

    When people talk about optical switching, the conversation often gravitates toward high-speed applications—nanosecond switching, MEMS arrays, and complex cross-connect systems. But in the real world, the vast majority of fiber optic networks rely on a simpler, more proven technology: the 1x1 optical switch.

    At its core, a fiber optic switch with a 1x1 configuration does one thing: it opens or closes a single optical path. Think of it as a programmable “on/off” valve for light. While it may not sound as glamorous as a 32x32 matrix, this simple function is critical for system monitoring, redundancy switching, and reconfigurable add-drop multiplexing.

We recently took a close look at the OSW-1X1A series from Coreray, and it’s a good reminder that sometimes the most reliable components are also the most straightforward.

Built for the Long Haul

    One of the first things that stands out in the spec sheet is the lifetime rating: 10 million cycles minimum. For a network monitoring application that switches once every minute, that translates to nearly 20 years of continuous operation. The epoxy-free optical path is another detail that matters over time—no outgassing means no contamination on the fiber end faces, even in sealed modules.

    The operating temperature range (-40°C to +85°C) is what we’ve come to expect from carrier-grade gear. Whether you’re deploying this switch in an outdoor cabinet in the middle of winter or in a densely packed data center, the performance remains consistent. The temperature-dependent loss (TDL) is spec’d at ≤0.25 dB, which means you won’t see unexpected signal dips as ambient temperatures fluctuate.

Two Control Modes, One Simple Choice

A common point of confusion when selecting a mechanical optical switch is whether to choose latching or non-latching. The OSW-1X1A offers both, and the decision comes down to power consumption and fail-safe requirements.

·         Non-Latching: The switch returns to its default state when power is removed. This is ideal for fail-safe applications where you want the optical path to close (or open) in the event of a power loss.

·         Latching: The switch maintains its state without continuous power. You only apply a pulse to change the state, then it stays there. This is perfect for battery-powered or power-sensitive deployments.

    The driver circuitry is straightforward: a 3V or 5V pulse triggers the switching action, and the current draw ranges from 26 mA to 66 mA depending on the version. For system designers, that means you can drive these directly from most microcontrollers without needing external relay drivers.

Where Does a 1x1 Switch Actually Go?

    In a metropolitan area network, a 1x1 optical switch is often used for system monitoring. You place it between the main transmission line and a monitoring port. Under normal conditions, the switch is set to “through” mode, passing the signal to its destination. When a test instrument needs to analyze the signal, the switch momentarily diverts a portion of the light to the monitoring equipment.

    In research labs, these switches are indispensable for automated test setups. Instead of manually patching fiber cables every time you want to change a configuration, you can program the switch to change states under software control. With a switching time of ≤8 ms, it’s fast enough for most lab automation workflows.

Another application is configurable optical add-drop multiplexing (OADM) . By pairing a 1x1 switch with a wavelength-selective component, you can dynamically add or drop specific channels without disrupting the rest of the traffic.

Low Loss, High Isolation

    Optical performance is where the OSW-1X1A really shines. In the 1260-1670 nm range (the C-band and L-band used for most telecom and data center links), the typical insertion loss is just 0.5 dB. That’s comparable to a good quality fusion splice. The return loss is ≥50 dB, meaning reflections are kept to a minimum—critical for systems with sensitive lasers that can be destabilized by back reflections.

    Crosstalk is another key spec: ≥55 dB in the telecom bands. That means if you’re switching between two paths, less than 0.0003% of the signal leaks into the unintended port. For high-density wavelength-division multiplexing (WDM) systems, that level of isolation is essential to prevent channel interference.

Practical Considerations for Integration

    The physical dimensions are compact: 55 mm × 26 mm × 10.8 mm, weighing just 16 grams. That makes it easy to integrate into existing boards or modules. The fiber leads come with options for 250μm bare fiber, 900μm loose tube, or 2.0mm cable, so you can match the pigtail style to your handling requirements.

    Connector options cover the usual suspects: FC/PC, FC/APC, SC/PC, SC/APC, LC/PC, and LC/APC. For high-power applications (up to 500 mW), it’s worth noting that the connector choice can affect power handling, especially with angled physical contact (APC) connectors that offer lower back reflection.

The Bottom Line

    If you’re designing a system that needs to route, monitor, or block optical signals with high reliability and minimal insertion loss, don’t overlook the humble 1x1 Optical Switch. The OSW-1X1A series from Coreray delivers the performance metrics that matter—low loss, high isolation, long lifetime—in a compact, easy-to-integrate package.

    Choosing a reliable Fiber Optic Switch manufacturer like Coreray ensures that your system not only meets today’s requirements but also stands up to years of field operation. Whether you need a mechanical optical switch for a metropolitan network, a lab automation setup, or a remote monitoring station, having a well-specified 1x1 switch in your toolkit is never a bad idea.