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Asia Communications and Photonics Conference

Encoding of the Soliton Molecules in a Passively Mode-Locked Fiber Laser

Haoguang Liu, Yixiang Sun, Yao Yao, Yusong Liu, Yiyang Luo, Qizhen Sun

Published Nov 2, 2024• 1 citation
Publisher

Abstract

Soliton molecules possess abundant degrees of freedom, therefore exhibiting the versatile dynamics. The manipulation of soliton molecules has been vigorously ongoing in recent years, with the aim of achieving on-demand harnessing. In our work, via selecting two different states of the soliton pair as encoding elements, a binary encoding scheme is experimentally realized. The proposed scheme verifies the feasibility of solitonic encoding by gain control, as well as releases its potential in all-optical storage.

DOI
10.1109/acp/ipoc63121.2024.10809733

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Soliton molecules possess abundant degrees of freedom, therefore exhibiting the versatile dynamics. The manipulation of soliton molecules has been vigorously ongoing in recent years, with the aim of achieving on-demand harnessing. In our work, via selecting two different states of the soliton pair as encoding elements, a binary encoding scheme is experimentally realized. The proposed scheme verifies the feasibility of solitonic encoding by gain control, as well as releases its potential in all-optical storage.
We demonstrate the operation of an all-optical buffer based on temporal cavity solitons stored in a nonlinear passive fiber ring resonator. Unwanted acoustic interactions between neighboring solitons are suppressed by modulating the phase of the external laser driving the cavity. A new locking scheme is presented that allows the buffer to operate with an arbitrarily large number of cavity solitons in the loop. Experimentally, we are able to demonstrate the storage of 4536 bits of data, written all optically into the fiber ring at 10 Gb/s for 1 min.
In the last years the increasing complexity of quantum information protocols triggered the development of integrated waveguide technology for quantum applications [1-3] such that stability is intrinsically obtained thanks to the combination of many optical elements on a monolithic chip and scalability is potentially achievable. In this context the realization of integrated sources of quantum light is of fundamental interest. Some experimental implementations using parametric down conversion in nonlinear materials [4], as well as in semiconductors [5] have been reported. However, in the landscape of integrated devices, the realization of one important source of entangled states is still missing: a source of spectrally indistinguishable photon pairs emitted on two different spatial modes, which share entanglement in the polarization degree of freedom without the need of post-selection. This source is widely adopted in bulk setups [6], indeed entanglement is a fundamental requirement for quantum information purposes and the polarization of photons is the most used degree of freedom for quantum information encoding. However the implementation of such a scheme in integrated waveguides is a challenging task due to the combination of orthogonal polarizations and the need of two different spatial modes.