The nonlinear optical property of germanium saturable absorber and its application in normal dispersion Er-doped fiber laser

Zhao, Rui; Qiu, Jianfeng; Sun, Shuo; Sui, Zhiqi; Yang, Fuhao; Zhang, Huanian; Zhao, Xin

doi:10.1016/j.infrared.2022.104445

Cited by 8 publications

(2 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Wang et al demonstrated for the first time the broadband absorption of germanium in a laser and obtained three different wavelengths within the 1-2 µm range [50]. Zhao et al achieved passive mode-locked for the first time in a normal dispersion EDFL, with a central wavelength of 1568.92 nm [51]. Zhao et al have achieved a high-performance 1.9 µm passive Q-switching operation with a maximum single-pulse energy of 48.5 µJ [52].…”

Section: Introductionmentioning

confidence: 99%

Passively mode-locked Er-doped fiber laser with single and double wavelength pulses based on germanene saturable absorber

Ding,

Liu,

et al. 2024

Laser Phys.

Self Cite

View full text Add to dashboard Cite

In this paper, we focus on the single crystal material germanium (Ge), which is fabricated into saturable absorbers (SAs) employing liquid phase exfoliation, and validate it with an erbium-doped fiber laser (EDFL). The Ge SA was obtained with a modulation depth of 9.8% and a saturation intensity of 11.02 MW cm−2. The single-wavelength mode-locked pulse with a minimum pulse width of 847 fs was obtained at a cavity length of 10.5 m. In addition, at a cavity length of 106 m, a dual-wavelength mode-locked phenomenon was obtained in which the central wavelengths were located at 1559.20 nm and 1561.31 nm. The experimental results show that Ge nanosheets in an EDFL provide a strong basis for the development of nonlinear optics and have a wide range of applications in the field of pulsed fiber lasers.

show abstract

Section: Introductionmentioning

confidence: 99%

Passively mode-locked Er-doped fiber laser with single and double wavelength pulses based on germanene saturable absorber

Ding,

Liu,

et al. 2024

Laser Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Thanks to its narrow bandgap and high electron mobility upon doping [5], Ge has become a key material for the development of high-speed photodetectors at near-infrared (NIR) wavelengths [6][7][8][9]. Recently, Ge thin films have been coated on fiber facets and have shown excellent saturable absorption effects in fiber lasers, making this traditional semiconductor material an attractive candidate for the development of novel mode-locked lasers [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Polymer-Embedding Germanium Nanostrip Waveguide of High Polarization Extinction

Liu,

Zhang

2023

Polymers

View full text Add to dashboard Cite

Germanium (Ge) nanostrip was embedded in a polymer and studied as a waveguide. The measurements reveal that this new type of semiconductor/polymer heterogeneous waveguide exhibits strong absorption for the TE mode from 1500 nm to 2004 nm, while the propagation loss for the TM mode declines from 20.56 dB/cm at 1500 nm to 4.89 dB/cm at 2004 nm. The transmission characteristics serve as an essential tool for verifying the optical parameters (n-κ, refractive index, and extinction coefficient) of the strip, addressing the ambiguity raised by spectroscopic ellipsometry regarding highly absorbing materials. Furthermore, the observed strong absorption for the TE mode at 2004 nm is well beyond the cut-off wavelength of the crystalline bulk Ge (~1850 nm at room temperature). This redshift is modeled to manifest the narrowing of the Tauc-fitted bandgap due to the grain order effect in the amorphous Ge layer. The accurate measurement of the nanometer-scale light-absorbing strips in a waveguide form is a crucial step toward the accurate design of integrated photonic devices that utilize such components.

show abstract

La/Ge stacked nanosheets designed as optical resonators, microwave oscillators and 5 G/6 G gigahertz receivers

Alkhamisi

Qasrawi

Khanfar

2023

Optik

View full text Add to dashboard Cite

The nonlinear optical property of germanium saturable absorber and its application in normal dispersion Er-doped fiber laser

Cited by 8 publications

References 45 publications

Passively mode-locked Er-doped fiber laser with single and double wavelength pulses based on germanene saturable absorber

Passively mode-locked Er-doped fiber laser with single and double wavelength pulses based on germanene saturable absorber

Polymer-Embedding Germanium Nanostrip Waveguide of High Polarization Extinction

La/Ge stacked nanosheets designed as optical resonators, microwave oscillators and 5 G/6 G gigahertz receivers

Contact Info

Product

Resources

About