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

In the first article, I explained the six key parameters of optical switches. Now let’s get practical.

    I’ll walk you through four common application areas – telecom networks, fiber optic sensing, lab test systems, and data centers – and give you specific recommendations, parameter thresholds, and real‑world examples from Coreray’s project files (www.coreray.com).

Scenario 1: Telecom Networks (Backbone, Metro, Access)

Telecom is where optical switches became essential – mainly for optical line protection (OLP), signal monitoring, and wavelength routing.

A. Long‑haul backbone (≥100 km)

These are national or provincial trunk lines. Stability is everything. Any extra loss directly reduces the span between amplifiers.

Recommended type: Mechanical, 2×2 or 1×2, latching.
Key parameters: IL ≤0.4 dB, isolation ≥50 dB, switching time ≤10 ms, temp range -40~85 °C, lifetime ≥20 million cycles.
Why not MEMS? MEMS typically has IL ≥1.0 dB – too high for long‑haul.

Real case: We supplied 1×4 single‑mode latching switches to a backbone project in western China. The customer tested three brands. Only Coreray’s switches kept IL variation under 0.1 dB across -30 °C to 65 °C. They signed a two‑year framework agreement.

Critical warning: Always choose latching for OLP. Non‑latching switches drop to a default port after a power outage – which could be the dead fiber. I’ve seen this take down a provincial network for 45 minutes.

B. Metro network (10–100 km)

Metro is cost‑sensitive but still demands good performance. Common port counts: 1×4, 1×8, 2×2.

Recommended type: Mechanical or mid‑range MEMS.
Parameters: IL ≤0.5 dB, isolation ≥45 dB, switching time 5–15 ms.
Watch out for repeatability – metro systems often monitor signal power; poor repeatability triggers false alarms.

C. Access network (≤10 km)

Fiber‑to‑the‑home, enterprise connections. Cost is king.

Recommended type: Entry‑level mechanical, 1×8 or 1×16.
Parameters: IL ≤0.8 dB, isolation ≥40 dB, switching time ≤15 ms.
Don’t overbuy: A 0.3 dB switch costs twice as much as a 0.8 dB switch, but in a short link, you’ll never notice the difference.

Scenario 2: Fiber Optic Sensing (DAS, DTS, Temperature/Pressure)

Fiber sensing is booming – pipelines, perimeter security, power cable monitoring. This application is very different from telecom.

Why sensing is special:

·         Signals are extremely weak.

·         Crosstalk causes false alarms.

·         Often outdoors in harsh environments.

Recommended type: Industrial‑grade mechanical or MEMS, 1×8 or 1×16.
Critical parameters:

·         Isolation ≥50 dB (55 dB is better)

·         Operating temp -40~85 °C

·         IP65 or higher for outdoor use

A costly mistake: A security company used standard telecom switches (35 dB isolation) in their DVS system. Every time a truck passed one fiber, three other channels triggered false alarms. They switched to Coreray’s industrial MEMS optical switch  (55 dB isolation, IP67) – false alarms dropped from 200 per day to fewer than 5.

For industrial sensing (power plants, chemical plants): add vibration resistance ≥10 g and repeatability ≤±0.05 dB.

For medical sensing (endoscopes, patient monitors): size and power matter. Look for miniature MEMS – Coreray offers 8×8×4 mm, <80 mW.

Scenario 3: Lab Test & Production Systems

Test equipment (OTDR, spectrum analyzers) often needs to poll multiple fibers automatically. Here, repeatability and fast switching are key.

Recommended type:

·         General test: mechanical (cost‑effective)

·         High‑speed polling (>100 Hz): MEMS or solid‑state

Parameters: Repeatability ≤±0.05 dB, crosstalk ≥50 dB, switching time as needed.

Often overlooked: control interface.
If your test system uses an FPGA or MCU, TTL is easiest. If controlled by a PC, RS232 or USB is better. Coreray provides standard protocols and example C/Python code – this alone saves you a week of development.

Real case: A major optical module manufacturer in Shenzhen replaced manual fiber swapping with Coreray’s 1×8 MEMS switch. Test throughput increased 30 %, and human error was nearly eliminated.

Scenario 4: Data Center Optical Circuit Switching (OCS)

Hyperscale data centers are moving from electrical packet switching to optical circuit switching to reduce power and latency. Here, optical switches route entire wavelength channels or fiber pairs between servers.

Key requirements:

·         High port count (8×8, 16×16, up to 64×64)

·         Low power per port

·         Fast reconfiguration (milliseconds to sub‑millisecond)

·         Hot‑swappable modules

Recommended type: MEMS optical switch matrix.
Mechanical switches are too bulky and power‑hungry for high‑port‑count matrices.

Parameters to watch:

·         IL ≤1.5 dB (for 16×16) – higher than telecom but acceptable in short data center links.

·         Crosstalk ≤ -50 dB

·         Switching time ≤5 ms (≤1 ms for advanced systems)

·         Operating temp 0~70 °C (commercial grade is fine indoors)

Real deployment: A major Chinese cloud provider tested Coreray’s 4×64 MEMS optical switch matrix in their OCS prototype. They achieved 64‑channel dynamic reconfiguration with only 1/10th the power consumption of an equivalent electrical switch.

Caveat: MEMS switches are sensitive to vibration. If your data center has high‑speed fans or you’re deploying in a mobile environment (e.g., a ship or vehicle), ask for ruggedized MEMS with vibration dampening.

Quick Reference Table

In the third article, we’ll tackle high‑power lasers, LIDAR, military applications – plus a step‑by‑step selection workflow and common mistakes to avoid.

Bookmark www.coreray.com for updates.