We derive a pulse propagation equation for a graphene-clad optical fiber, treating the optical response of the graphene and nonlinearity of the dielectric fiber core as perturbations in asymptotic expansion of Maxwell equations. We analyze the effective nonlinear and attenuation coefficients due to the graphene layer. Based on the recent experimental measurements of the nonlinear graphene condu...

Meeting Prof. Oldeman is a memorable experience. I remember well his entries in the lecture hall. A towering figure appears, clad in a green cape, his posture a striking blend of Sandeman and Zorro. So I had met with Prof. Oldeman: a lucid, multilingual, well-spoken gentleman, who travels all continents and boasts a wide range of interests that includes his students. These were the beginnings o...

We derive pulse propagation equation for a graphene-clad optical fibre, treating optical response of graphene and nonlinearity of the dielectric fibre core as perturbations in asymptotic expansion of Maxwell equations. We analyse the effective nonlinear and attenuation coefficients due to the graphene layer. Based on the recent experimental measurements of the nonlinear graphene conductivity, w...

PurposeGastroesophageal reflux disease (GERD) is a common condition in patients with end-stage lung disease. Previous cohorts have shown an association between GERD and chronic allograft dysfunction (CLAD), but these findings not been consistent. Our previous studies show that GERD, defined as >48 total episodes associated CLAD. We hypothesized the cutoff to define transplant recipients (LTRs) ...

The numerical modeling of actively Q-switched fiber lasers is systematically presented. On the basis of typical Q-switched ytterbium-doped double-clad fiber lasers under forward and backward pump, the dynamic characteristics of pulse energy, pulse width, population inversion, and stored energy at tens-of-kilohertz repetition rates are studied by using the traveling-wave method. The laser perfor...

We report the demonstration of a near-diffraction-limited, compact, diode-end-pumped double-clad planar waveguide Nd:YAG laser. Efficient laser operation was achieved for the three dominant Nd(3+) transitions, at 1.064, 0.946, and 1.32microm , with TE polarized output powers of 1.33, 0.57, and 0.33 W for the available output couplers. The output beam from the monolithic plane-plane laser cavity...