Abstract
We demonstrate a broadband acousto-optic notch filter based on a tubular-lattice hollow-core fiber for the first time to our knowledge. The guided optical modes are modulated by acoustically induced dynamic long-period gratings along the fiber. The device is fabricated employing a short interaction length (7.7 cm) and low drive voltages (10 V). Modulated spectral bands with 20 nm half-width and maximum depths greater than 60% are achieved. The resonant notch wavelength is tuned from 743 to 1355 nm (612 nm span) by changing the frequency of the electrical signal. The results indicate a broader tuning range compared to previous studies using standard and hollow-core fibers. It further reveals unique properties for reconfigurable spectral filters and fiber lasers, pointing to the fast switching and highly efficient modulation of all-fiber photonic devices.
| Original language | English |
|---|---|
| Pages (from-to) | 690-693 |
| Number of pages | 4 |
| Journal | Optics Letters |
| Volume | 49 |
| Issue number | 3 |
| Early online date | 29 Jan 2024 |
| DOIs | |
| Publication status | Published - 1 Feb 2024 |
Data Access Statement
Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.Keywords
- Fiber lasers
- Long period fiber gratings
- Notch filters
- Photonic crystal fibers
- Photonic devices
- Spectral properties