Optical Attenuation Module

It is an electronically controlled attenuation module used to precisely control the intensity of optical signals and is widely used in optical communications, laser systems, sensing and testing. It reduces optical power in a controlled manner to avoid signal overload or non-linear effects while maintaining the stability of the optical system.

Specification

Resources

1. Module internal diagram

2. Technical Parameter

Model	HC-MVOA-2-SM
Fiber type	SM（9/125）
Calibration wavelength	1310/1550nm
Attenuation range	0 ~ 30 dB (excluding insertion loss)
VOA mode	MEMS Dark or Bright (optional)
Insertion Loss ¹	≤1.2dB
Attenuation accuracy	≤±0. 3dB
Optical power monitoring range	-50~ +23 dBm
Optical power accuracy	≤±0. 25dB
Resolution	0.01 dB
Wavelength dependent loss	≤0.25 dB
Polarization dependent loss	≤0.2 dB
Return loss	≥50 dB
Response time	≤10ms
Input optical power	≤500 mW
Optical interface	FC/APC (optional)
Fiber length	1m (0.9 casing)
Operating voltage/current	DC5V±10%，I≤300mA
Operating temperature	-5 ~ 70 °C
Storage temperature	-40 ~ 85 °C
Module size	90(L) x 55(W) x 12(H) ±0.2mm

Note: 1. All parameters are tested at room temperature.

2.All parameters do not include the insertion loss of the connector, and a pair of connectors adds 0.3dB loss.

3. Module size diagram

4. pin definition

Pin number	Pin definition	Direction and type of signal	Functional description
3	VCC	Power	Operating power supply, DC 5V, 1.0 A
6	GND	Power	GND
9	TXD	Output	Serial port data sending end (LVTTL level serial port)
10	RXD	Input	Serial port data receiver (LVTTL level serial port)

Note: The M3 module electrical interface uses MOLEX's 87833-1620.

It is recommended that the customer connector use MOLEX's 87568-1694.

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Resources

Optical Attenuation Module