Photodiode Étienne

These photodiodes were developed by Étienne in cooperation with the AEI and altered to peak at about 16.2MHz.

• Schematic
• Interactive Schematic
• HAMAMATSU S5971: Photodiode @ 960NM, 100MHz

To achieve a peak at around 16.2MHz, components had to be changed.
Changed components:

• For Coil L1 the part 1812CS-682XJLC (or at least a part with the same form factor) has to be used
• C3 influences at which frequency the peak will be
• Instead of the AD587, LT1236A-10 can be used
  • When doing this, the C19 component must not be soldered.
  • C19 connects pin 8 of U5 to ground. Pin 8 is not in use in LT1236A-10.

• The photodiode requires a power input of +/- 15V
• AC Output: right SMA connector
• DC Output: left SMA connector
• When using a spectrum-analyzer (e.g. RIGOL DSA815) in combination with the ROHDE&SCHWARZ signal-generator, a 50Ω terminator must be used, too

The traces of the amplitude and phase were measured.

• A <fc #ff0000>RIGOL Network Analyzer</fc> was used to gather that data from the AC output
• A 9V test-laser with a modulation of <fc #ff0000>[-10dB @ 100MHz]</fc> was used in this experimental setup
• The traces of the diodes were fitted with Python