# Distributed Bragg Reflectors

Pyanodons item · internal name `dbr` · stack size 100 · first craftable in tier 7 (Production science pack, [tier 7](https://factorio.kalzumeus.com/tier/7.md))
HTML page: https://factorio.kalzumeus.com/item/dbr/

## Produced by (1 recipes)

### Distributed Bragg Reflectors (`dbr`)

- 20 s · tier 7 · productivity modules allowed
- Ingredients: 5 × [Silica powder](https://factorio.kalzumeus.com/item/silica-powder.md), 6 × [1D Photonic Crystal](https://factorio.kalzumeus.com/item/1d-photonic-crystal.md), 100 × [Niobium complex](https://factorio.kalzumeus.com/fluid/niobium-complex.md), 200 × [Vacuum](https://factorio.kalzumeus.com/fluid/vacuum.md), 1 × [Nanocrystalline core](https://factorio.kalzumeus.com/item/nanocrystaline-core.md)
- Results: 2 × [Distributed Bragg Reflectors](https://factorio.kalzumeus.com/item/dbr.md)
- Made in: Nanomaterial factory MK 01, Nanomaterial factory MK 02, Nanomaterial factory MK 03, Nanomaterial factory MK 04
- Unlocked by: [Battery - Stage 4](https://factorio.kalzumeus.com/tech/battery-mk04.md)

## Used in (3 recipes)

- Fiber Bragg Grating (`fbg`, tier 7) → [Fiber Bragg Grating](https://factorio.kalzumeus.com/item/fbg.md)
- Finite Difference Time Domain Photonic Structure (`fdtd`, tier 7) → [Finite Difference Time Domain Photonic Structure](https://factorio.kalzumeus.com/item/fdtd.md)
- Spent Organic Quantum Battery (`quantum-battery`, tier 7) → [Spent Organic Quantum Battery](https://factorio.kalzumeus.com/item/used-quantum-battery.md)