My current design documents for the avalanche photodiode (APD) circuit board are shown bellow in the attachments. The current design for the Excilitas C30645 consists of using 3 power sources: a high voltage 85+ Voltage source (for bias voltage), and a +-30-40V source. These voltages will then be regulated down to 75V (TPS7A4001), and +-15V (LM317/LM337) respectively.

To create a low noise reference, the LT1021-5 precision 5V reference will be used in conjunction with an npn and pnp transistor circuit to create +-5V references. The +5V reference will be used as the input reference with an op455 op amp (capable of handling high voltages) to achieve an adjustable output bias voltage of 70, 65, 60, or 55 volts. The regulated 75 volts and -5V reference will then be placed on the op455's power terminals. Next, this output bias voltage will be sent through a buffer and accross the APD. 

Finally, the low noise transimpedance amplifier (op184) will take the signals from the APD and boost it to the DC and differential outputs. The current APD circuits are ready for testing in a lab as simulations have been done to confirm their viability. The last steps will be to chose a proper capacitor for the transimpedance amplifier such that it is properly stabilized. (A second post explaining that process will be added once done)