MAX3701: Interfacing the MAX3701 to a Blue/Violet Laser Diode [Application Brief]
Abstract: This Application Brief is an outline of the detailed information that can be found in the complete version of HFDN (High Frequency Design Note) 028.0.
HFDN-028.0 explains in detail how optical measurements were performed, and provides guidelines for interfacing
the MAX3701 blue laser driver with the blue/violet laser.
Figure 1. Optical output of a blue/violet laser driven by the MAX3701.
Background and Purpose
Optical measurements of the MAX3701 driving a blue/violet laser diode were performed prior to the release of the MAX3701 in October of 2003. These measurements verified that the MAX3701 is capable of driving the blue/violet laser with rise/fall times of ≤1ns and overshoot <9% as shown in Figure 1.
This Application Brief is an outline of the detailed information that can be found in the complete version of HFDN (High Frequency Design Note) 28.0. HFDN-28.0 explains in detail how optical measurements were performed, and provides guidelines for interfacing the MAX3701 with the blue/violet laser.
The complete version of HFDN-28.0 can be obtained by request from the following link: MAX3701 datasheet.
Topics include:
Optical Evaluation Printed Circuit Board
Materials and layout of the MAX3701 optical evaluation board
Schematic diagram of the laser interface
Connections and geometry of transmission lines
Optical Test Equipment
Optical test equipment setup
Mounting information, including thermal heat sink
Fiber optic patch cable alignment
Optical-to-electrical converter
Oscilloscope-recorded waveforms of blue/violet laser driver optical output
Performance Optimization
Parasitic elements
Reducing overshoot and ringing on rising and falling edges
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