Based on the design from Pierre and me, I modified the TAMA PD today. The modification is as following:

1. Change op-amp to LMH6624

2. Set R1 to be 33Ohm

3. Set R2 to be 330Ohm

4. Put 3pF capacitor in parallel with R2

5. Change photodiode parallel capacitor to be 150pF

Figure 1 is after I remove op-amp. Figure 2 is after I put the new op-amp. Figure 3 is after I put R1, R2, 3pF and 150pF. Figure 4 shows the label I put on this PD.

I also measured the TAMA PD noise level with bandwith of 2GHz and 10MHz. The 10MHz measurement is around 14MHz. I found:

1. The offset is about 0.1V

2. Figure 4 shows the main oscillation is around 268MHz with amplitude of 5uV_rms/sqrt(Hz). 

3. Figure 5 shows the noise peak is a bit higher than the designed value. This is due to the photodiode parallel capacitor was chosen to be 150pF, but the designed value is 160pF. We can choose to put a 10pF in parallel with the 150pF one.