High Performance Of 8-Channel Multi-Mode Optical Attenuator With
Display
Multimode optical attenuator is a kind of optical device specially
designed for multimode optical fiber system, its main function is
to adapt to different application requirements by adjusting the
intensity of the input optical signal. The following is a detailed
explanation of the multi-mode opto-controlled optical attenuator:
Definition and principle
Definition: A multimode optically controlled optical attenuator is
a device that adjusts the intensity of the optical signal in a
multimode fiber by electronic control.
Principle: It is mainly composed of two parts: multi-mode
interferometer and program control unit. The multimode
interferometer uses the interference effect to adjust the relative
intensity of different wavelengths of light in the transmission
path, and the program control unit is responsible for controlling
the difference of waveguide length in the multimode interferometer,
so as to achieve accurate control of optical signal attenuation.
Second, structure and characteristics
Structure:
Multimode interferometer: The key component of optical signal
attenuation, using the interference effect to adjust the intensity
of the optical signal.
The program control unit is responsible for controlling the
waveguide length difference in the multi-mode interferometer, and
changing the waveguide length through electronic devices to achieve
accurate control of optical signal attenuation.
Features:
Precise control: The amount of attenuation can be adjusted as
needed, and the optical power information is monitored and fed back
in real time to maintain a stable attenuation level.
Strong flexibility: suitable for a variety of optical communication
and optical system applications, such as optical fiber
communication, optical fiber sensing.
Specification
| Model # | U8328S |
| Attenuator Range | 0~35 dB(40dB Type) |
| Calibration Wavelength (Option) | 850 nm (908/980 nm可选) |
| Insertion Loss | ≤ 1.8 dB Type 1.5dB |
| Fiber Type | 50/125um, 62.5/125um MMF 自适应 |
| Connector Type | FC/UPC Connector (FC/APC 可选) |
| Attenuation Accuracy | ± 0.10 dB (0 ~ 30 dB) |
| Repeatability | ±0.10 dB |
| Averaging time of monitor PM | 2~1000 ms |
| Settling Time | 200ms |
| Attenuation Transition Speed | 0.1 ~ 33 dB/s |
| Return Loss | > 25 dB |
| Communication Interface | RS232, USB, RJ45 Control by PC |
| Maximum safe input power | +27dBm |
| Recalibration Period | 2 years |
| Operation Temperature | 0～ +40℃ |
| Storage Temperature | -30～+80℃ |
| Power | 100~240 V |
| Dimensions | 245mm W, 105mm H, 320 mm D |
| Weight | 5 kg |
Application field
Optical fiber communication: In optical fiber communication
systems, optical attenuators are widely used to regulate and limit
optical signals to ensure signal transmission quality.
Optical fiber sensing: In optical fiber sensing technology, optical
attenuators are used to adjust the intensity of optical signals to
meet the needs of different optical sensing applications.
