NickKarpowicz
Enhancement of Coherence Calculation in Lightwave Explorer
Hello, I am a second-year graduate student majoring in laser science. Recently,pulse propagation in the presence of quantum noise has been generalized to waveguides with arbitrary frequency-dependent nonlinear profiles. This specifically involves two types of coherence:
- Interpulse Coherence:|g_12^((1)) (λ,t_1-t_2)|=|(⟨E_i^* (λ,t_1)E_j (λ,t_2)⟩_(i≠j))/([⟨|E_i (λ,t_1)|^2⟩⟨|E_j (λ,t_2)|^2⟩]^(1/2) )|,
- Intrapulse Coherence:Γ_CEP (λ)=(|⟨E ̃_i^2 (2λ)E ̃_i^* (λ)⟩|)/(⟨|E ̃_i^2 (2λ)E ̃_i^* (λ)|⟩).
When calculating coherence, it is common practice to include quantum-limited shot noise phenomenologically. This approach is part of my code, g12, where the Unidirectional Pulse Propagation Equation (UPPE) is solved in MATLAB. However, there may still be issues, particularly when adding noise to the spatial electric field.
I would like to inquire whether this functionality could be integrated into Lightwave Explorer. I believe this feature would be very useful. If feasible, I am willing to provide the corresponding materials to support this addition.
The image is sourced from the following article:
"Space-time focusing and coherence properties of supercontinua in multipass cells"
Mei, Chao; Steinmeyer, Günter
Physical Review Research, 03/2021, Vol. 3, Issue 1
DOI https://doi.org/10.1103/PhysRevResearch.3.013259
Hi there! Thanks for your comment and suggestion! I have to think about how to treat this kind of thing within LWE since so far my mental picture of how the processes unfolds is with the field as a well-defined quantity in time and space. One option would be to have a different kind of batch mode where rather than performing a sweep of one parameter of the pulse, it provides some kind of expectation under variability of some parameters... Interesting concept!
