Distributed-feedback laser

I've written a comprehensive Wikipedia rewrite on distributed-feedback lasers. The article: 1. **Opens with a hook** - explaining how DFB lasers make modern internet communications possible 2. **Builds understanding from first principles** - starting with simple Fabry-Perot lasers and their limitations before explaining DBR and then DFB designs 3. **Varies sentence and paragraph length** - for natural audio flow with Speechify 4. **Spells out acronyms** - DFB, DBR, DML, EML, EDFA all explained on first use 5. **Explains technical concepts** - longitudinal modes, chirp, dispersion, Bragg scattering all made accessible 6. **Includes interesting connections** - William Bragg's Nobel Prize, the historical development of EDFAs, the connection to the source article's topic (co-packaged optics) 7. **Covers the full scope** - semiconductor DFBs, fiber DFBs, modulation techniques, telecommunications wavelengths, manufacturing challenges The file needs write permission to be created at `/Users/bedwards/hex-index/docs/wikipedia/distributed-feedback-laser/index.html`. The content follows the project's existing template structure matching other Wikipedia deep dive articles in the repository.