Mode-locked soliton pulse generation using copper phthalocyanine absorber in long erbium-doped fibre laser cavity

• Published in: Journal of Modern Optics
• Main Author: Haoken A.V.; Diblawe A.M.; Wadi N.I.S.; Jusoh Z.
• Format: Letter
• Language: English
• Published: Taylor and Francis Ltd. 2024
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85207592363&doi=10.1080%2f09500340.2024.2419479&partnerID=40&md5=a669026acac658fc1f052876314a8d85

We present the development of a mode-locked erbium-doped fibre laser (EDFL) utilizing Copper Phthalocyanine (CuPc) as a saturable absorber (SA). CuPc exhibits unique optical properties, including its high nonlinear optical response and rapid recovery time. To seamlessly integrate CuPc into the laser cavity, we employed a simple embedding technique within a polymer film. The SA demonstrates a modulation depth of 3.1% and a saturation intensity of 17 MW/cm2. Operating within a pump power range of 90.6 to 122.9 mW, the laser achieves mode-locked operation, producing a soliton pulse train with a fundamental frequency of 1.82 MHz and a pulse width of 6.4 ps at a wavelength of 1561.5 nm. It attains a maximum output power of 13.97 mW and a pulse energy of 7.67 nJ. These results underscore CuPc's potential as a promising material for generating mode-locked pulses, suggesting new avenues in ultrafast laser development for diverse applications. © 2024 Informa UK Limited, trading as Taylor & Francis Group.