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Electronic Variable Optical Attenuators, Voltage Controlled & SM Fiber Coupled![]()
V1550A Electronic VOA, FC/APC Version Typical transmission as a function of applied voltage for all models, which are offered with FC/PC or FC/APC connectors. ![]() Please Wait
![]() Click to Enlarge A female BNC connector is located on one end of the barrel, and fiber leads with either FC/APC or FC/PC connectors are integrated into the opposite end. Each barrel is engraved with the shown information for convenience. Features
Thorlabs' Fiber-Coupled Electronic Variable Optical Attenuators (VOAs) are microelectromechanical system (MEMS) based devices that provide attenuation up to >30 dB or >25 dB, depending on the model. The optical fiber built into each device is single mode over the specified operating wavelength range. Driving voltages of 0 to 5 V control optical transmission, which decreases with applied voltage. These high-speed VOAs support modulation up to 1 kHz. Protection diodes integrated into the design limit the input voltage to protect the VOA from ESD, as well as from other over-voltage and under-voltage events. A plot of the typical relationship between the applied voltage and the optical transmission for each electronic VOA model is included in the Specs tab. Most voltage sources, including power supplies, function generators, and digital-to-analog converters (DACs), can be used to control these electronic VOAs. Use a BNC cable (not included) to connect the electronic VOA to the voltage source. The MEMS VOA is an electrostatic device that inherently requires no current. However, the protection circuitry can draw up to 100 µA for applied voltages of 5 V. Either of the unit's 50 cm long fiber leads can be used as the input, as performance is similar in both directions. However, you may find that one of the connectors provides a lower loss connection in your set-up due to the random nature of core alignment. As shown in the image above, the barrel of each electronic VOA is etched, for convenience, with information such as the operating wavelength range, maximum optical input power, maximum modulation bandwidth, and driving voltage range. These VOAs are designed for use with optical fiber that is single mode within the operating range. Please see the Specs tab for information on the single mode fibers integrated into each model. Electronic VOAs with polarization-maintaining (PM) fiber and FC/APC connectors are available here. Fiber Core Alignment
![]() Click to Enlarge Typical Optical Transmission as a Function of Applied Voltage (Test Wavelengths: 520 nm for V450 models; 635 nm for V600 models; 850 nm for V800 models; 1060 nm for V1000 models; 1550 nm for V1550 models; 2000 nm for V2000 models) ![]() Click to Enlarge The supply current required to drive these electronic VOAs over the 0 to 5 V operating range is plotted above. ![]() Click for Details Mechanical Drawing of the Fiber-Coupled VOA Package
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The V450A and V450F are fabricated with and designed for use with optical fiber that is single mode within its operating range. An example of compatible single mode optical fiber is 460HP. Please note that minimum attenuation is highly dependent on connector alignment, especially at shorter wavelengths. Given specifications assume good core-to-core alignment at the connector. ![]()
The V600A and V600F are fabricated with and designed for use with optical fiber that is single mode within its operating range. An example of compatible single mode optical fiber is 630HP. Please note that minimum attenuation is highly dependent on connector alignment, especially at shorter wavelengths. Given specifications assume good core-to-core alignment at the connector. ![]()
The V800A and V800F are fabricated with and designed for use with optical fiber that is single mode within its operating range. An example of compatible single mode optical fiber is 780HP. Given specifications assume good core-to-core alignment at the connector. Please note that minimum attenuation is highly dependent on connector alignment. ![]()
The V1000A and V1000F are fabricated with and designed for use with optical fiber that is single mode within its operating range. An example of compatible single mode optical fiber is HI1060-J9. Given specifications assume good core-to-core alignment at the connector. Please note that minimum attenuation is highly dependent on connector alignment. ![]()
The V1550A and V1550F are fabricated with and designed for use with optical fiber that is single mode within its operating range. An example of compatible single mode optical fiber is SMF-28 Ultra. Given specifications assume good core-to-core alignment at the connector. Please note that minimum attenuation is highly dependent on connector alignment. ![]()
The V2000A and V2000F are fabricated with and designed for use with optical fiber that is single mode within its operating range. An example of compatible single mode optical fiber is SM2000. Given specifications assume good core-to-core alignment at the connector. Please note that minimum attenuation is highly dependent on connector alignment. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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