Dismas Choge

10 Questions 22 Answers 0 Followers

Questions related from Dismas Choge

Which nonlinear optical processes lead to multiple wavelength conversion in single period PPLN?

I have performed an experiment to frequency mix 974 nm LD laser and a C-band ASE laser source in a single period (10.2 um) MgO:PPLN. I however noticed five peaks at 487, 536, 598, 756, and 816 nm...

09 September 2018 9,787 8 View

How do I measure the splitting ratio of proton exchanged Y-junction waveguide?

I have a sample of Y-branch waveguides fabricated on lithium niobate substrate by annealed proton exchange (APE) process. I would like to measure the output power from each arm after coupling...

03 March 2017 8,252 6 View

Can someone help me plot the attached Fourier series using Matlab code?

I need a Matlab code to plot a rectangular wave function with a constant period and normalized amplitude. Please see the attached exponential Fourier series. Thank you in advance.

02 February 2017 9,921 4 View

How does magnetic field influence poling of lithium niobate/tantalate?

Periodic poling of lithium niobate/tantalate is often done using electric field applied across the crystal with patterned electrodes. How then is the poling process affected if it is performed in...

11 November 2016 4,418 0 View

How can i model negative corona discharge for a wire-to-plane geometry?

Dear all, I would like to study negative corona discharge for poling non linear optical crystals e.g Lithium Tantalate. I have however attempted to use plasma model example in COMSOL but i don't...

09 September 2016 5,300 3 View

Can anybody share modeling parameters in COMSOL Multiphysics for Mach-Zehnder interferometer or y-junction design?

COMSOL Multiphysics 5.2 (and above) has a solved Mach-zehnder interferometer in its model library for which part of its geometry is S-shape. I am using version 4.3b which doesn't have that...

01 January 2016 8,939 2 View

How do I design a Y-junction using comsol multiphysics or matlab?

Y-branch waveguide structures are fundamental elements of integrated optics devices such as power or optical splitters, power or optical combiners, integrated-optic gyroscopes, Mach-Zehnder...

01 January 2016 8,053 5 View

How do I correct the error in the matlab code?

I have a simple matlab code for plotting a Y-junction but it can't run. Any one with matlab knowledge can please advice me on the attached code.

01 January 2016 1,192 10 View

Which is the best simulation setup using VPI TransmissionMaker before field testing?

I am investigating the influence of different modulation formats on gain flatness of raman assisted fibre optical parametric amplifiers.

01 January 2015 7,266 2 View

wind and solar energy

can someone help me on how to use available wind velocity data to design a specification of a wind turbine generator

03 March 2010 6,977 4 View