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  • 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference
  • OSA Technical Digest (Optica Publishing Group, 2019),
  • paper cd_p_16

Experimental investigation of ultrafast solitonic all-optical switching in a high index contrast dual-core optical fiber

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Abstract

A novel type dual-core fiber (DCF), composed of two in-house synthesized glasses with high index contrast enabling significant anomalous dispersion [1] and cm range coupling length was optimized and studied in the near infrared. Following promising results of numerical simulations [2], we performed an experimental study in the 1500 – 1900 nm spectral range by using a tunable ultrafast laser source generating 70-fs pulses at a few μJ energy level. Continuous control of attenuation and polarization direction of the input field was ensured under separate excitation of a single fiber core, made of the low index glass with an effective mode area of 1.73 μm2 at 1500 nm. The dual-core cladding is made of high index glass including the 1.4-μm gap between the two cores. The series of camera pictures, imaging the output facet of the dual-core fiber at different input pulse energies, indicated nonlinear switching at distinct excitation conditions. A change in the dominancy of the output core of 32 mm long DCF was registered when 1700 nm,70 fs pulses with increasing energies in range of 100 – 300 pJ (measured before in-coupling optics) were launched into the fiber. Output spectra were registered separately for the two cores, when the nonlinear switching was observed according to the camera registrations.

© 2019 IEEE

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