Continuously tunable organic solid-state laser based on the adjustment of effective refractive index

We report a facile way for continuously tuning the lasing wavelength of an organic solid-state laser by varying the effective refractive index. The effective refractive index of the organic gain medium can be fine controlled by the dopant concentration in the DCJTB:PS film. Continuous wavelength tun...

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Bibliographic Details
Published in:Journal of alloys and compounds 2017-12, Vol.729, p.513-517
Main Authors: Feng, Yajie, Yu, Xiaolei, Zhang, Rui, Wu, Jianwei, Zhang, Peng, Chen, Shijian, Zhang, Dingke
Format: Article
Language:English
Subjects:
Broadband
Distributed feedback
Dopants
Effective refractive index
Emissions
Gratings (spectra)
Laser applications
Lasers
Lasing
Organic solid-state laser
Planar waveguides
Refractivity
Solid state lasers
Spectral emissivity
Spontaneous emission
Studies
Tunable lasers
Tuning
Wavelength
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Summary:We report a facile way for continuously tuning the lasing wavelength of an organic solid-state laser by varying the effective refractive index. The effective refractive index of the organic gain medium can be fine controlled by the dopant concentration in the DCJTB:PS film. Continuous wavelength tuning of laser and amplified spontaneous emission (ASE) are achieved in the distributed feedback (DFB) gratings and planar waveguides, respectively. In the DFB laser, laser emission is demonstrated in the red spectral region with a tunable wavelength range of 30 nm, centered at 612 nm. The laser exhibits a well-defined pump threshold and good emission characteristics. Furthermore, ASE with a large wavelength range of 40 nm is also achieved by varying the dopant concentration, thus giving one the freedom to set or tune the lasing wavelength to meet a particular purpose with a common structure. Our results allow for a simple, broadband continuous tuning of the laser emission wavelength. [Display omitted] •Continuously tunable organic solid-state laser based on the adjustment of effective refractive index was obtained.•Tunable wavelength ranges of 30–40 nm are obtained.•The effective refractive index of the organic gain medium can be fine controlled by dopant.•Our results allow for a simple, broadband continuous tuning of the laser emission wavelength.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2017.09.172