Design of 4 × 1 Power Beam Combiner Based on MultiCore Photonic Crystal Fiber

Dror Malka,Zeev Zalevsky,Eyal Cohen

doi:10.3390/app7070695

Dror Malka, Zeev Zalevsky + Show 1 more

Open Access

https://doi.org/10.3390/app7070695

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Abstract

A novel concept of 4 × 1 power beam combiner based on multicore photonic crystal fiber is described. The light coupling obtained by integrating small air-holes in the multicore photonic crystal fiber (PCF) structure allows light coupling between coherent laser sources to the central core. The beam propagation method (BPM) and coupled mode theory were used for analyzing the proposed device. Simulation results show that four coherent fiber laser sources of 1 µm in a multicore PCF structure can be combined into one source after 2.6 mm light propagation, with a power efficiency of 99.6% and bandwidth of 220 nm. In addition, a higher 8 × 1 ratio combiner was demonstrated, based on the proposed device. Thus, the device can be very useful to combine beams.

Highlights

In 1961, the first laser based on neodymium (Nd3+ ) doped fiber was demonstrated [1,2]
We have shown a new approach of designing specific air holes in a multicore photonic crystal fiber (PCF)
Through beam propagation method (BPM) simulation results, we showed that the energies of four optical signals at 1 μm Through BPM simulation results, we showed that the energies of four optical signals at wavelength can be combined into one source output in a PCF structure with dimensions of 38 μm ×

Summary

Introduction

In 1961, the first laser based on neodymium (Nd3+ ) doped fiber was demonstrated [1,2]. The benefits of using a fiber laser as a light source: strong stability against thermo-optic effects, ease of use and higher gain, can be obtained by long fiber, while still keeping a compact cavity structure Another advantage of fiber lasers is the capability to achieve output power values as high as. 1 and 16 × 1methods power combiner to PCF solve[20] This The problem, we propose a new approach that involves small air-holes in the PCF structure, on combining was achieved by replacing some air-holes areas with pure silica along which theHowever, control of this lightapproach coupling between close cores without changing refractive index the fiberallows length. In order toThus, solve this this technique problem, can we propose newthe approach small for air-holes in thea combiner device based on multicore. A higher ratio of 8 × 1 combiner was designed

Principle of the

Results

Simulation Results

Conclusions

Optical