VOA Variable Optical Attenuator
Kernstech's 532nm/633nm Circulator is a high-performance optical device used to control the direction of light within fiber optic systems. With a center wavelength of 532nm and 633nm, this circulator is ideal for use in a range of applications such as fiber amplifiers, fiber sensors, and medical devices. The product is designed to minimize insertion loss, provide high return loss, and ensure robust isolation, ensuring consistent signal integrity. Its polarization-insensitive nature makes it suitable for diverse environments, ensuring stable operation in both standard and advanced systems.
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Product Description
| Parameter | Spec | Unit | |
| Port Type | 3 Port | / | |
| Center Wavelength | 532,633 | nm | |
| Operating Wavelength Range | ±5 | nm | |
| Typ.Peak Isolation @23℃ | 22 | dB | |
| Min.Isolation @23℃ | 20 | dB | |
| Typical Insert loss@23℃ | 1.5 | dB | |
| Max.Insertion Loss@23℃ | 20 | dB | |
| Min.Extinction Ratio @23℃(PM Fiber Type) | 20 | dB | |
| Max.Polarization Dependent Loss @23℃(Single Mode Fiber Type) | 0.15 | dB | |
| Min.Return Loss(Input &Output) | 40 | dB | |
| Minimum Crosstalk | 40 | dB | |
| Max.Average Power(includingport 1 and port2) | 0,5,1,2 | W | |
| Max.ns pulse peak power | 10orSpecified | kW | |
| Max.Tensile Load | 5 | N | |
| Package Dimensions | 38×28×26 | mm | |
| Operating temperature | +10~+50 | ℃ | |
| Storage temperature | 0~+60 | ℃ | |
Product Description
The VOA Variable Optical Attenuator is a high-precision optical component engineered to dynamically adjust optical signal intensity with exceptional accuracy and reliability. Leveraging advanced micro-electromechanical systems (MEMS) or magneto-optic technology, it enables continuous, electrically controlled attenuation across a broad wavelength spectrum (1200–1650 nm). The device features a compact form factor (≤30mm in length) and a robust, hermetically sealed housing, ensuring stable performance in both laboratory and harsh industrial environments. Its low insertion loss and high attenuation range make it an essential tool for signal conditioning in optical networks, laser systems, and precision measurement setups.
Features
Precision Attenuation Control: Offers a wide attenuation range (0–60 dB) with 0.01 dB resolution, enabling fine-grained adjustment for critical signal optimization.
Low Loss Performance: Insertion loss ≤0.5 dB (typical ≤0.3 dB) and return loss ≥55 dB, minimizing signal degradation and back reflections.
Fast Response Time: Electronic control allows real-time adjustments within 10 μs (MEMS-based) or 1 ms (magneto-optic), ideal for dynamic network applications.
Wide Wavelength Compatibility: Supports standard telecom bands (1310 nm, 1550 nm), DWDM channels (1525–1565 nm), and specialty wavelengths (980 nm, 1480 nm).
High Power Handling: Standard models support up to +30 dBm (1 W) CW, with high-power variants capable of 5 W for industrial laser systems.
Polarization Insensitivity: Polarization-dependent loss (PDL) ≤0.1 dB, ensuring uniform performance across all polarization states.
Applications
Optical Communication Networks: Balances signal power in long-haul DWDM systems, data centers, and 5G fronthaul networks to prevent receiver saturation.
Laser Systems & Amplifiers: Optimizes output power in fiber lasers and EDFAs, protecting downstream components from excessive light levels.
Test & Measurement: Simulates fiber loss for network troubleshooting, component characterization, and compliance testing (e.g., BER testing).
Medical Devices: Controls light intensity in laser surgery (e.g., 532 nm, 1064 nm) and endoscopic imaging to ensure safe, precise operation.
Sensor Networks: Stabilizes signal levels in distributed temperature sensing (DTS) and fiber Bragg grating (FBG) systems, reducing noise interference.
Faq
Q: What is the difference between analog and digital VOA control?
A: Analog control uses a voltage input (0–5 V) for continuous adjustment, while digital control employs an I2C/SPI interface for programmable step attenuation.
Q: Can it handle pulsed laser signals with high peak power?
A: Yes, it supports pulse widths as short as 10 ns, provided the average power does not exceed the rated continuous power limit.
Q: How is attenuation linearity ensured across the full range?
A: Advanced calibration algorithms and precision mechanics achieve linearity within ±0.5% of the set value.
Q: Is external cooling required for high-power operation?
A: No, passive thermal design with heat-dissipative coatings ensures stable performance up to +30 dBm without active cooling.
Q: What connector types are available?
A: Standard options include FC/APC, SC/APC, LC, and custom connectors (e.g., MU, E2000) for specialized applications.
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