Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 8, 2013
|
|
---|---|---|
Article Number | 13059 | |
Number of page(s) | 8 | |
DOI | https://doi.org/10.2971/jeos.2013.13059 | |
Published online | 29 August 2013 |
Regular papers
Wavelength-dependent nonlinear optical loop mirror for simultaneous amplitude noise reduction at two wavelengths
1
Centro de Investigaciones en Óptica, Loma del Bosque 115, Col. Lomas del Campestre, 37150 León, Gto, Mexico
2
Instituto Nacional de Astrofísica, Óptica y Electrónica (INAOE), L. E. Erro 1, Tonantzintla, 72000 Puebla, Pue., Mexico
Received:
29
May
2013
Accepted:
16
August
2013
We propose and study analytically and numerically a polarisation-imbalanced Nonlinear Optical Loop Mirror (NOLM) scheme exhibiting a wavelength-dependent nonlinear characteristic. The device includes a symmetric coupler, an isotropic (or, in practice, twisted non-polarisation-maintaining) fibre loop and a section of high birefringence (HiBi) fibre to break the polarisation symmetry. Thanks to the wavelength-dependent phase shift of the HiBi fibre, wavelength-dependent switching is obtained. For proper orientation of the HiBi fibre in the loop plane and using linear input polarisation at 45° with respect to its birefringence axes, the NOLM switching power varies with wavelength, whereas its zero low-power transmission and 100% maximal transmission are constant. Through slight adjustments of the HiBi fibre birefringence, which can be realised mechanically or thermally, the ratio between switching powers at two particular wavelengths can be readily adjusted. We show numerically that this scheme can be applied to simultaneous amplitude regeneration of two wavelength channels exhibiting uneven power levels.
Key words: Nonlinear optical loop mirror / fibre-optic devices / wavelength-selective devices / optical signal regeneration
© The Author(s) 2013. All rights reserved.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.