【New Product Release】FF2122 Optical Fiber Acoustic Sensor: Using Optical Fiber to "Listen" to the Mysteries of the World

2025-01-17

Product Introduction

The basic working principle of the optical fiber microphone is as follows: A light - emitting diode serves as the light source. The light is incident onto a metal - coated diaphragm through an optical fiber. When a sound signal causes the diaphragm to vibrate, the incident light is modulated by the vibration of the diaphragm and then reflected. The receiving optical fiber captures the reflected light, and after demodulation, the light can be restored to an acoustic signal.

The audio output of the optical fiber microphone is an analog output based on a standard audio cable. It doesn't require any additional pre - amplifiers or amplifiers. Each optical fiber microphone undergoes individual calibration during the manufacturing process to achieve consistent performance and ensure proper operation throughout its lifespan.


System Composition

The FF2122 optical fiber microphone kit consists of an optical fiber microphone, optical fibers, an optoelectronic conditioning module, an audio cable, a power supply, etc.

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  1. Optical fiber microphone: An element sensitive to sound and light.

  2. Optical fiber: Transmits optical signals.

  3. Optoelectronic conditioning module: Used for the transmission and reception of optical signals, as well as the conversion between optical and electrical signals.

  4. FC/APC optical fiber flange: Connects the optical fiber acoustic probe.

  5. Working indicator light.

  6. 12 VDC DC power interface.

  7. 3.5mm headphone output port. It can be connected to a standard headphone, or a 3.5mm male headphone - to - BNC data cable (not a standard accessory) can be used to connect to an oscilloscope or data acquisition device.


Application Scenarios

Integrating the characteristics of optics and acoustics, the fiber - optic acoustic sensor features high sensitivity, compact structure, electromagnetic interference resistance, and passive front - end. It can be widely applied in the following fields:


  • Industrial Equipment Monitoring: For the surveillance of various industrial facilities to ensure their stable operation.

  • High - voltage Electrical Equipment: Enables accurate acoustic monitoring in high - voltage electrical environments, which helps detect potential faults.

  • High - explosive Areas: Its non - electrical and explosion - proof nature makes it suitable for use in high - explosive zones.

  • Nuclear Magnetic Resonance Imaging (MRI) Environments: Due to its immunity to strong magnetic fields, it can be used for acoustic monitoring during MRI procedures.

  • High - Electromagnetic and Radio - frequency Interference Environments: Can function effectively in areas with intense electromagnetic and radio - frequency interference.

  • Petrochemical and Nuclear Industries: Ideal for use in these industries where high - reliability and anti - interference monitoring are required.

  • Confidential Communication: Facilitates secure communication by leveraging its unique properties.

  • Stage Broadcasting and Recording: Provides high - quality acoustic sensing for stage performances and recording studios.

  • Electromagnetic Compatibility Testing Laboratories: Used to test and evaluate the acoustic performance of devices under electromagnetic interference condition.


Functional Features

  • Electromagnetic/Radio - frequency Interference Resistance: Resistant to electromagnetic and radio - frequency interference, ensuring stable operation in complex electromagnetic environments.

  • Passive Sensing Element: Adopts a passive sensing element, which is more energy - efficient and reliable, without the need for an active power supply at the sensing end.

  • Wide Frequency Response: Covers a relatively wide frequency range, enabling it to accurately detect and respond to various acoustic signals.

  • Standard Analog Output: Offers a standard analog output, which is convenient for direct connection with a variety of existing audio - related devices and systems.

  • High Reliability and Environmental Stability: Features high reliability, capable of operating stably for a long time. It also has excellent environmental stability, adapting well to different environmental conditions such as temperature, humidity, and pressure changes.

  • Optical Fiber Connection with No Signal Loss: Utilizes optical fiber connection, which can transmit signals without significant signal loss, ensuring the high - quality transmission of acoustic information.


Frequency response

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