Abstract
This letter proposes the use of a refractive index profile with a graded core and a cladding trench for the design of few-mode fibers, aiming an arbitrary differential mode delay (DMD) flattened over the C+ L band. By optimizing the core grading exponent and the dimensioning of the trench, a deviation lower than 0.01 ps/km from a target DMD is observed over the investigated wavelength range. Additionally, it is found that the dimensioning of the trench is almost independent of the target DMD, thereby enabling the use of a simple design rule that guarantees a maximum DMD deviation of 1.8 ps/km for a DMD target between-200 and 200 ps/km.
| Original language | English |
|---|---|
| Pages (from-to) | 438-441 |
| Number of pages | 4 |
| Journal | IEEE Photonics Technology Letters |
| Volume | 25 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 18 Feb 2013 |
Bibliographical note
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- Differential mode delay
- few-mode fibers
- refractive index profile