• MEMS -1×N Optical Switch
  • MEMS -1×N Optical Switch
  • MEMS -1×N Optical Switch

MEMS -1×N Optical Switch

MEMS-1×N optical switch (hereinafter referred to as MEMS optical switch) is a modular product with multi-channel optical path switching function. MEMS optical switch products are optical switches made of electrostatically driven micro-mirror solutions. They have the characteristics of small size, fast response speed and stable performance, and can be widely used in various optical communication and testing systems. The schematic diagram of its optical path is as follows:

Scope of application
Multi-channel optical monitoring in optical transmission system;
LAN multi-light source/detector automatic switching, optical sensing multi-point dynamic monitoring system;
In the optical test system, it is used for optical fiber, optical device, optical network and field engineering optical cable test;
Optical device adjustment.

MEMS -1×N Optical Switch
Fast switching speed and long life
Low loss, high reliability
Modular design, small size
TTL interface, easy to control

Technical indicators
serial number parameter unit index Remark
1 Working wavelength nm 1250~1700  
2 Test wavelength nm  1310&1550 customizable
3 Fiber Type   single/multimode  
4 aisle   32 2-32 channels can be customized
5 Insertion loss dB ≤1.0  
6 return loss dB ≥50  
7 repeatability dB ≤±0.02  
8 crosstalk dB ≤-50  
9 switching time ms ≤15  
10 switch life Second-rate ≥109  
11 Maximum input optical power mW 500  
12 Operating temperature -5~+75  
13 storage temperature -40~+85℃  
14 Power Requirements V DC 5V  

Electrical Characteristics
1×N MEMS Optical Switch Electrical Characteristics Table
serial number parameter unit minimum typical maximum
1 Supply voltage (VCC) VDC 4.5 5 5.5
2 Digital I/O logic high level (VIH, VOH) VDC 2.0 3.3 3.8
3 Digital I/O logic low level (VIL, VOL) VDC 0 0.5 0.8
4 Power consumption (@5.0V) mW - - 600
Note: There are some differences between different modules, please refer to the actual power consumption.

Instructions for use
Outline Drawing and Installation Instructions
The external dimension of the MEMS optical switch module is 68 mm×30 mm×13 mm. Taking a 1×4 optical switch as an example, the external dimensions are shown in Figure 2 (other models only differ in the number of fibers):

When installing the MEMS optical switch module, the optical fiber must not be bent excessively (refer to Figure 3), so as not to affect the performance index.

Pin Definition
pin number pin
pin type level Function Description
1 NC / / /
2 VCC Power IN / DC +5V Positive input of power supply, maximum current 120mA
3 /STROBE IN LVTTL TTL mode: valid on falling edge
4 GND Power IN   power ground
5 D0 IN LVTTL TTL mode: data bit D0 input
6 NC / / Reserved interface, no electrical connection
7 NC / / Reserved interface, no electrical connection
8 NC / / Reserved interface, no electrical connection
9 D2 IN LVTTL TTL mode: data bit D2 input
10 D4 IN LVTTL TTL mode: data bit D4 input
11 GND Power IN   power ground
12 D1 IN LVTTL TTL mode: data bit D1 input
13 D3 IN LVTTL TTL mode: data bit D2 input
14 /RESET IN LVTTL Reset, active low, pulse width ≥ 0.5ms

Note: LVTTL is 3.3V LVTTL; STROBE (pin 3)
Only used in TTL mode, D0~D4 can change the level when it is high, and a falling edge pulse will make the optical switch switch to the corresponding channel.
RESET (14 pins)
A falling edge pulse switches the optical switch to the reset state, and the optical path is channel 1.

1) The MEMS optical switch module has a control circuit interface, which is connected to an external control circuit through a direct outlet. The interface pins are defined as shown in Table 3. After the optical switch is started, it is initialized to the reset state, and the optical path is channel 1.
2) After the optical switch module is powered off, the optical path cannot be maintained on the original channel.
3) The MEMS optical switch module has an input and output fiber bundle, and the fiber diameter is φ0.9mm. The input fiber (public fiber) is marked with 0, and the output fiber is marked with 1, 2, 3, and 4 respectively, indicating 4 corresponding output fibers.
4) MEMS optical switch module control mode: TTL parallel digital I/O control.

LVTTL parallel digital I/O control
LVTTL control can only be used for optical switches with 5 LVTTL control pins (D0, D1, D2, D3, D4), up to 32 channels. The corresponding relationship between the level of the LVTTL control pin and the channel is shown in Table 4. When using, the LVTTL control pin should be configured according to the actual number of optical paths of the optical switch.
aisle D4 D3 D2 D1 D0
1 0 0 0 0 0
2 0 0 0 0 1
3 0 0 0 1 0
23 1 0 1 1 0
24 1 0 1 1 1

The logic control diagram is as follows

Precautions and maintenance
In order to avoid damage to the MEMS optical switch module, please read the following rules carefully before use:
1) Please use alcohol cotton to clean the fiber end face of the connector before use, and wear a dust cap when not in use to prevent dust or other dirt from contaminating or damaging the fiber end face. Damage or contamination of the fiber end face will affect the performance of the MEMS optical switch.
2) It is strictly forbidden to pull, fold or twist the optical fiber to avoid damage to the optical fiber.
3) For the detailed pin definitions of the control interface, refer to Table 3 above to ensure that the wiring is correct. After confirming that the connection is correct, power on again. Note: The working voltage of the MEMS optical switch module cannot exceed the rated voltage, and the power supply and ground cannot be reversed, otherwise the module will be damaged.
4) When the external circuit needs to be changed, please turn off the power first, and then disconnect the control line of the module.
5) When the MEMS optical switch module has optical signal input, do not look directly at the fiber end face. Laser radiation is invisible but can cause damage to the human eye!
6) This device should be fireproof and shockproof, and avoid storing and working in an excessively humid environment.
7) This device is a precision optical device and should not be disassembled without authorization to avoid damage.
8) The product is used under the specified conditions and will not pollute the atmosphere, water and land. The packaging does not contain hazardous waste and can be safely disposed of by the user.
9) The parts and components replaced by product maintenance shall be brought back by the maintenance personnel of our unit for disposal according to regulations. When the product is discarded or scrapped, the user shall dispose of it in accordance with environmental protection regulations.

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