Abstract
Distributed feedback lasers with laterally coupled ridgewaveguide
surface gratings having the protrusions placed alternately on the lateral sides of the ridge are demonstrated. This configuration enables easier-to-fabricate wider
trenches than in the gratings with protrusions placed symmetrically on both sides of the ridge. The design strategy and coupling coefficient calculations are discussed. The output characteristics of fabricated lasers show lower threshold
currents and higher slope efficiencies for devices with first order alternating gratings than for those with third-order symmetric gratings having comparable grating trench widths and similar coupling coefficients
surface gratings having the protrusions placed alternately on the lateral sides of the ridge are demonstrated. This configuration enables easier-to-fabricate wider
trenches than in the gratings with protrusions placed symmetrically on both sides of the ridge. The design strategy and coupling coefficient calculations are discussed. The output characteristics of fabricated lasers show lower threshold
currents and higher slope efficiencies for devices with first order alternating gratings than for those with third-order symmetric gratings having comparable grating trench widths and similar coupling coefficients
| Original language | English |
|---|---|
| Pages (from-to) | 3141-3144 |
| Number of pages | 4 |
| Journal | Optics Letters |
| Volume | 42 |
| Issue number | 16 |
| DOIs | |
| Publication status | Published - 15 Aug 2017 |
| Publication type | A1 Journal article-refereed |
Publication forum classification
- Publication forum level 2