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Questions related to Optics
I'm trying match the phase between different links(all the links has same devices with same parameters). As i know i have to place an exact same length of the fiber between all the links to...
23 March 2018 10,019 2 View
I am trying to optimally couple the light from a pulsed Nd:YAG laser source into a 2mm core fibre. The wavelength range is between 680nm - 1050nm. The output beam from the laser is large so...
22 March 2018 2,932 5 View
During sliding wear in a ball on disc (BoD) configuration, given all conditions are identical i.e normal load, temperature, sliding speed and counterface material, only difference being the...
14 March 2018 4,150 10 View
There are many fields where light field can be utilized. For example it is utilized in microscopy [1] and for vision based robot control [2]. Which additional applications do you know? Thank you...
06 March 2018 2,562 3 View
Hi fellow researchers, I am trying to purify a protein of 50KDa for structure function analysis and folding unfolding kinetics using chemical denaturant. I have purified my protein from Inclusion...
03 March 2018 9,810 3 View
Total internal reflection (TIR) is a key mechanism for many optical devices and mentioned in any optics course. But why is the reflection angle identical to the angle of incidence? Why isn't it...
19 February 2018 5,717 14 View
"Phonon energy" is typically used to describe the resonance energy of lattice vibrations. As the host phonon energy decreases , we need more number of phonons to bridge the energy gap between...
16 February 2018 1,447 4 View
How the electronegativity affect on the solubility of two metals? that consequence to form a Core-Shell, Inter-metallic and alloy of metals. I am looking for answer corresponding to bulk or nano size.
14 February 2018 9,693 2 View
I got the data, but do not understand how to use it?
12 February 2018 7,090 6 View
Dear colleagues, Without nonlinear absorption, the Z-scan curve corresponding to the pure nonlinear refraction will be symmetric around the origin O. The nonlinear absorption will lead to...
07 February 2018 4,405 10 View
Is there any open source alternative to Rsoft's Optsim, Optiwave's Optisystem and other commercial softwares?
06 February 2018 9,766 1 View
Dear colleagues, The Z-scan technique is proposed by Sheik-Bahae et al [1]. Theoretically, when there is no nonlinear absorption, the Z-scan curve must be symmetric around the origin of the...
03 February 2018 3,300 4 View
In Optical OFDM system such as DD-OFDM, does the higher frequency (as we move farther from the carrier, ex. (N)) is delayed after the fiber by Td= DL(delta lambda)? Or it will move faster and have...
11 January 2018 4,537 0 View
The non-holographic mechanism of achromatic wavefront reconstruction is based on a geometric-optical reflection of reconstructing radiation from surfaces with constant phase differences between...
09 January 2018 3,155 14 View
Suppose an objective lens is having numerical aperture of 0.65 and magnification of 45X. What will be its focal length?
18 December 2017 7,946 4 View
From spectroscopic results it has been seen that Half-Metallic compounds may have optical band gap. Band structures of Half-Metals are overlapped by majority (or minority) spin channel. Now how...
12 December 2017 4,563 4 View
Leakage Current noted by cleanfog and E-Field by coulomb 3D software, so how to correlate
04 December 2017 1,495 4 View
Wavelength is small compared to the particle size! For Mie theory: Extinction paradox, the scattered power is larger than the power incident on the drop. Experimental setup: Water drop is...
20 November 2017 379 4 View
Dear all, I have an optical setup for cleaning up the laser diode beam, which includes coupling the laser light into a polarization-maintaining single mode FC/APC fiber. I have a technical...
20 November 2017 8,553 6 View
Suppose I have a amplitude only reflective SLM. And I need a pattern to be amplitude modulated and displayed in my sample (chicken skin). In such a case I would be loading SLM with my required...
17 November 2017 2,844 32 View
We want to put 2 Watt of 665.0 nm light through a 20 m long polarization maintaining fiber. We are searching for a fiber which has low Stimulated Brillouin scattering (SBS) loss at that wavelength.
09 November 2017 873 3 View
how to improve optical properties in Ag doped Zno and Au doped Zno
06 November 2017 2,693 5 View
The question is about the best type of magnetron used for sputtering ITO-films with good electrical and optical properties, and if there is a need of using different magnetrons for reactive and...
02 November 2017 8,980 5 View
Tauc formula (ahv)^(1/n) versus photon energy (hv). where a: is the optical absorption coefficient, which can be calculated from absorbance(A), and thickness of the sample(t) using:...
30 October 2017 4,714 3 View