Electronic Variable Optical Attenuators
Chapter 3: Introduction & Quick Start
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TTN095737-D02
Figure 1
Front View
Chapter 3 Introduction & Quick Start
3.1. Introduction
The EVOA1550F and EVOA1550A are electronically controlled variable
optical attenuators (EVOAs) for single mode fiber applications. The control
knob allows analog adjustment of the attenuation, while the digital meter
reports the actual output power. A key feature is the Power Lock function,
which allows the user to lock the output power level by using the VOA as a
power stabilizer.
These EVOAs are designed for use with standard single mode fiber (e.g.
SMF-28e+) and accept either FC/PC connectors (Item # EVOA1550F) or
FC/APC connectors (Item # EVOA1550A). The wavelength selector switch
accesses calibrated settings for 1310 nm and 1550 nm, and also provides a
position which the user can calibrate for any wavelength from 1250 nm to
1625 nm.
The unit is battery powered and can last for hundreds of hours on a single
charge. Charging can be done through the utility side panel with either the
included external power supply or a USB mini-B cable (not included). The side
panel also provides an external modulation input and a power monitoring
output via SMA connectors.
3.2. Features
Digital Display
Wavelength
Selector: 1310 nm,
1550 nm, or User
Bi-Stable Lock
Button
Fiber Bulkhead (2 Places)
2.0 mm Narrow Key
Label Indicates PC or
APC Compatibility
Utility
Panel
Power Adjustment
Knob
Rocker
Power
Switch
