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Questions related to Optics
I am examining the stability of a normal gait through a kinematic parameter (Displacement) analysis.But I am getting negative Lyapunov exponent to Z-direction (transverse plane) but positive in...
15 September 2017 8,337 5 View
When I cut the optical fiber, due to the large diameter of the fiber, cracks are formed on the surface.By polishing the fiber, the fiber surface becomes angular.This phenomenon greatly affects the...
13 September 2017 9,577 2 View
Dear colleagues, I have a biological background and know a bit principles of work of optical ring resonators. However, I wonder whether this nice methodology has any limitations. For example, how...
06 September 2017 929 3 View
I need this information, because of I want to study what the role of phospholipids were, or rather, vesicles of phospholipids in the primeval earth so they were undergone to an intense UV-C...
02 September 2017 7,236 3 View
Can someone tell me the procedure to calculate the dielectric functions by including the excitonic effects using time-dependent Hartree–Fock calculations (TDHF) based on the HSE06 calculations in...
22 August 2017 3,130 2 View
I want to excite a fabry perot filter with a white light. But the filter height is around 10-20 microns. Is it possible to couple a white light into the filter through optical fibre or a waveguide?
21 August 2017 9,905 15 View
hill, Currently I am doing ph.d in photonics, specifically in optical communications. Will anyone please suggest me the carrer options after completion of my degree.
18 August 2017 3,754 2 View
PDH is one method what are other options to achieve stable locking of of DFB-LD to scanning fabry perot etalon with FSR=1.5GHz and 3-dB BW=7.5MHz. I want to lock DFB-LD to FPE negative...
17 August 2017 3,841 1 View
If two or more beams are overlapped or combined at a point in space, what will be the resultant spot size at the point of combination?
17 August 2017 9,211 2 View
Q-factor= 20*log10(sqrt(2)*(erfcinv(2*(BER)))); I have searched a lot but unfortunately I only found the equation above that calculate the Q from BER ,but the Q will be infinity when the BER is 0....
15 August 2017 347 3 View
According to ASHRAE the values of tb and td for Atlantic, I want their values according to cities or latitude and longitude Thanks
04 August 2017 5,533 4 View
It is obvious that solar radiation can be concentrated using any optical concentrator such as lenses or parabolic mirrors. This is possible because the solar rays are parallel as they are coming...
19 July 2017 9,864 3 View
I am reading about the Diffuse Correlation Spectroscopy for non-invasive, micro-vascular cerebral blood flow measurament.The device used for the topic is a combination of DCS+NIRS/DOS. The system...
12 July 2017 5,759 4 View
Required little help to explain Resonant (leading to Kerr, Kerr-quintic nonlinearities) and nonresonant (leading to the transitions in quantum levels) optical nonlinearities.
11 July 2017 8,685 2 View
How to settings the adsorption and refractive index for measuring particle size in suspended using a Malvern Mastersizer 3000 E?
10 July 2017 8,394 4 View
When I expand the phase mismatch (for three signals interacting nonlinearly in optical fiber delta-beta with dispersion slope (dB = B(f1) + B(f2) - B(f3) - B(f1+f2-f3) , where B (Propagation...
09 July 2017 6,803 3 View
When simulating light pipes, will the choice of a source (collimated beam vs angular beam) make any difference on the efficiency of the light pipe to channel light from source on one end to the...
05 July 2017 3,482 3 View
Hi, Any advice on how to track stem cells in vivo for
29 June 2017 6,812 3 View
I have a bulk quasi-phase matched non-linear crystal with waveguide dimension of 5um*4.5um, as provide in this link http://www.hcphotonics.com/products2.asp?area=1670&cat=1751&sn=938. Is...
25 June 2017 5,352 2 View
Hi everyone, What configuration of lenses is utilized to make light sheets for imaging purposes?
19 June 2017 6,424 3 View
Is there a concept of optical oscillators (like an electronic LC oscillator) or a tunable laser can be used as an oscillator?
09 June 2017 1,765 3 View
I am looking for a high power LED with a central wavelength of around 488 nm. I know Thorlabs sells one at 490 nm that supplies 216 mW of optical power at 488 nm. However, I need at least 1 W at...
02 June 2017 4,437 3 View
"One of the most fascinating predictions of the theory of general relativity is the effect of gravitational lensing, the bending of light in close proximity to massive stellar objects. Recently,...
31 May 2017 8,921 3 View
I have removed Fresnel lens from rear projection TV but it is plane/smooth/without grooves/without Newton rings. It concentrate the solar radiations to some extent. The Fresnel lens with grooves...
30 May 2017 381 3 View