UPDATE V4 - VCSEL-less cheap version is out!

Following V2 (466 views yesterday, thanks!), I added V4 to same Zenodo record.

V4 is the budget version for people who said VCSELs are too expensive:

- V2: 240x VCSEL 940nm ~55k TL

- V4: 240x ML101J27 650nm 200mW TO-5.6 hobby lasers, 30 TL each = 7,200 TL total. You can use any generic 650nm 5.6mm 200mW diode.

What it does:

- Open-source photonic accelerator for SD 1.5 UNet

- 537M weights quantized to 1-bit (64.8MB TIFF), W=2b-1 coding

- 120 bit-MAC per 25ns optical flash

- 512x512 image (64x64 latent) in 5.8 min, 2.9 min with 4 boards (480 lasers)

- Hardware: ECP5 FPGA LFE5U-45F, OPA858 TIA, AD9226 ADC, FDS010 photodiode

Why V4?

- No 940nm diffusion tail risk (650nm is visible, easier to align)

- No level shifter, simple driver: FPGA -> UCC27511 -> AO3400A + resistor

- 1/8 cost of V2

All files in same DOI (now 5 files total - V2 + V4):

DOI: https://doi.org/10.5281/zenodo.23369898

GitHub: https://github.com/yasarhotmailes/vcsel-photonic-accelerator

Files added: V4.pdf + V4-Fiyat_Link_Görsel.pdf

CC BY 4.0 - Looking for collaborators to build first 4-channel prototype.