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

    For years, mechanical Optical Switches were the default choice for routing signals in fiber networks. They were reliable, well-understood, and widely available. But as networks push toward higher frequencies—think LIDAR, quantum communication, and high-frequency trading—the physical limitations of mechanical switches are becoming impossible to ignore.

This is where solid-state technology steps in. Recently, we’ve been evaluating a new class of Fiber Optic Switch products that operate at nanosecond speeds, and the shift is worth paying attention to.

The Problem with Moving Parts

    A standard mechanical optical switch relies on a tiny motor or solenoid to physically reposition a prism or fiber. Even the fastest ones take a few milliseconds to settle. In a high-repetition-rate application—like a 1 MHz test system—a millisecond switch simply can’t keep up. You’d spend more time waiting for the switch to change state than actually capturing data.

Mechanical switches also degrade over time. After millions of cycles, contacts wear out, repeatability drifts, and failure rates climb. For applications that demand 20 years of continuous operation, this becomes a major risk.

Solid-State: A Different Approach

    The Nanosecond Fiber Optic Switch from Coreray takes a fundamentally different approach. Instead of moving parts, it uses a patented electro-optical configuration. When you apply a TTL control signal, the optical path changes almost instantaneously—with a typical optical transition time of just 90 ns.

    In practice, that means you can switch from DC to 1 MHz without missing a beat. The driver options (200 kHz and 1 MHz) are designed to handle high-speed burst mode operations without introducing ripple or instability.

Performance That Matters

    Speed isn’t the only advantage. Because there’s no mechanical movement, the switch offers consistent low insertion loss across a wide wavelength range—from 520 nm up to 2200 nm. For users working in the C-band (1260-1650 nm), typical loss sits at just 0.6 dB. That’s a number you’d expect from a high-quality fixed coupler, not a fast-switching device.

    Another often-overlooked spec is return loss. This switch delivers 50 dB typical, which translates to minimal back reflection into your laser source. For coherent sensing or high-power applications, that can make a real difference.

    Speaking of power, the high-power version can handle up to 5W, making it suitable for fiber laser systems and industrial applications. And if you’re working at shorter wavelengths (below 780 nm), the NPLC version uses core-enlarged fiber to maintain low loss while managing higher power levels.

Real-World Applications

Where does this type of switch fit?

• Fiber Sensing: In distributed acoustic sensing (DAS) or Brillouin systems, you’re often dealing with pulse rates in the kilohertz range. A nanosecond switch allows you to interleave signals from multiple fiber strands without introducing dead time.

• LIDAR & Autonomous Systems: Time-of-flight systems rely on precise timing. A Fiber Optic Switch that can settle in under 100 ns helps improve range resolution.

• Test & Measurement: When characterizing fast photodetectors or modulators, you need a switching system that doesn’t distort the signal. The clean, ripple-free response of this solid-state design ensures your measurements reflect the device under test, not the test equipment.

A Few Practical Considerations

    Of course, no technology is perfect. Crosstalk in the single-stage version is rated at 25 dB typical, which is fine for many applications, but if isolation is critical, the dual-stage version bumps that to 36 dB. For most test and sensing setups, that’s more than enough.

    Temperature stability is another strong point. With an IL temperature dependency of just 0.25 dB typical, you can deploy these switches in outdoor cabinets or industrial environments without worrying about performance drift. The large-range version works from -30℃ to 85℃, covering most real-world conditions.

The Bottom Line

    If your system is still relying on mechanical switching, it’s worth asking whether that’s a design constraint or a limitation you’ve learned to live with. Solid-state Fiber Optic Switch technology has matured to the point where it offers faster switching, longer lifetime, and comparable optical performance—often in a smaller footprint.

    For engineers working on next-generation optical networks, LIDAR systems, or high-frequency instrumentation, the move to nanosecond switching isn’t just an upgrade; it’s a requirement. Choosing a reliable Optical Switches manufacturer like Coreray ensures that your system can scale to meet future demands without being held back by mechanical limitations.