PDH photodiode
About the PDH photodiode PCB
PDH photodiode is an open source PCB design by TU-Darmstadt-APQ, published on GitHub under the CERN-OHL-1.2 license. It is a 2-layer board measuring 47 × 55 mm, with 33 components from 18 distinct parts.
Other key parts include the LT3032EDE#PBF, LTC6269HDD-10#PBF and LTC6228HS8#PBF. By type, the board carries 15 capacitors, 11 resistors, 3 ICs, 3 connectors and 1 diode.
From the project
Fast photodiode for PDH-laser-locking
PDH photodiode =================== Wideband photodetector based on a Si-PIN photodiode (Hamamatsu S9055-01) and a transimpedance amplifier (TIA). The detector features an additional non-inverting (voltage) amplifier stage AC-coupled to the TIA designed for the purpose of Pound-Drever-Hall (PDH) laser locking.
An alternative version with Excelitas C30617L-100 InGaAs photodiode for applications between 960 nm and 1700 nm can be found here. All specs of the amplifiers hold for this version as well accounting for the significantly increased sensitivity of the photodiode.
Main components on the PDH photodiode
PDH photodiode bill of materials (BOM)
33 components, 18 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LT3032EDE#PBF LT3032 | Linear_DE14MA | U1 |
| 1 | LTC6269HDD-10#PBF LTC6269-10 | DFN-10-1EP_3x3mm_P0.5mm_EP1.65x2.38mm | U2 |
| 1 | LTC6228HS8#PBF LTC6228HS8 | SO-8_3.9x4.9mm_P1.27mm | U3 |
| 1 | ±5V-Supply | PinHeader_1x03_P2.54mm_Vertical | J1 |
| 1 | 901-143-6RFX AC Out | SMA_Amphenol_132203-12_Horizontal | J2 |
| 1 | 901-144-8RFX DC Out | SMA_Amphenol_901-144_Vertical | J3 |
| 1 | S9055-01 S9055 | TO-18-3 | D1 |
| 4 | UMR325AC7106MM-P 10u | C_1210_3225Metric | C1, C2, C5, C6 |
| 3 | GRM1885C1H103JA01D 10n | C_0603_1608Metric | C3, C4, C7 |
| 2 | C0603C180J5GACAUTO 18p | C_0603_1608Metric | C8, C15 |
| 4 | C0603C104K5RECAUTO 100n | C_0603_1608Metric | C9, C12, C13, C14 |
| 2 | DNF | C_0603_1608Metric | C10, C11 |
| 1 | RT0603DRE071KL 1k | R_0603_1608Metric | R1 |
| 4 | RR0816P-104-D 100k | R_0603_1608Metric | R2, R5, R6, R7 |
| 1 | RR0816P-203-D 20k | R_0603_1608Metric_mod | R3 |
| 2 | RT1206FRE0749R9L 49.9 | R_1206_3216Metric | R4, R11 |
| 2 | RR0816P-181-D 180 | R_0603_1608Metric | R8, R10 |
| 1 | RR0816Q-200-D 20 | R_0603_1608Metric | R9 |
PDH photodiode design files
The KiCad project lives in the TU-Darmstadt-APQ/PDH_photodiode repository on GitHub; these links point at the commit this page was built from.
- LayoutKiCad/PDH_photodiode.kicad_pcb
- SchematicKiCad/PDH_photodiode.kicad_sch
PDH photodiode: common questions
How big is the PDH photodiode PCB?
The PDH photodiode measures 47 × 55 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the PDH photodiode?
33 components, from 18 distinct parts. The full bill of materials is listed on this page.
Where can I download the PDH photodiode design files?
From the TU-Darmstadt-APQ/PDH_photodiode repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the PDH photodiode design in my own project?
Yes, under the terms of its CERN-OHL-1.2 license, which TU-Darmstadt-APQ chose for the repository.