Open AccesskW-class fiber-coupled diode laser source based on dense spectral multiplexing of an ultra-narrow channel spacing
Author(s) -
Heyuan Zhu,
Xingchen Lin,
Yawei Zhang,
Jianwei Zhang,
Biao Wang,
Jinlong Zhang,
Li Qin,
Yongqiang Ning,
Hao Wu
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.024723
Subject(s) - multiplexing , optics , materials science , laser , laser diode , wavelength division multiplexing , fiber bragg grating , diode , optoelectronics , physics , telecommunications , computer science , wavelength
A dense spectral multiplexing structure based on the reflective volume Bragg gratings is introduced to realize the diode laser multiplexing with an ultra-narrow channel spacing of 1.5 nm. With the combination of polarization multiplexing and coarse spectral multiplexing, a diode laser source producing 2045 W power from an output fiber with a core diameter of 105 µm and NA of 0.2 is achieved at an injection current of 10 A. The electro-optical and optical-optical efficiency of the laser source is 42% and 76%, respectively. Experimental results demonstrate the ability of dense spectral multiplexing based on VBG to realize high output power and brightness.