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Questions related to Optics
I got the data, but do not understand how to use it?
12 February 2018 7,184 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 4,518 10 View
Is there any open source alternative to Rsoft's Optsim, Optiwave's Optisystem and other commercial softwares?
06 February 2018 9,846 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 3,421 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 4,650 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 3,318 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 8,053 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 4,673 4 View
Leakage Current noted by cleanfog and E-Field by coulomb 3D software, so how to correlate
04 December 2017 1,583 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 479 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 8,631 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 2,926 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 957 3 View
how to improve optical properties in Ag doped Zno and Au doped Zno
06 November 2017 2,790 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 9,112 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 4,850 3 View
Dear colleagues, I have used LBP-1-USB Laser Beam Profiler, Newport. This device can measure two-dimensional and three-dimensional beam profiles as well as measure the beam radius very well. The...
27 October 2017 3,261 3 View
I may obtain a titanium:sapphire oscillator. I need to build an amplifier that is cheap. I have no prior experience in femtosecond physics, though I deal with optics and in the past dealt with...
27 October 2017 7,612 6 View
Through reviewing papers about passively mode-locking realized at 2 micron, almost everyone uses single mode fiber(such as Nufern SM_TDF_10P_130_HE) to realize mode locking? The problem is why...
27 October 2017 9,359 3 View
What is the difference in the designs of the regular Michelson Interferrometer autocorrelator and the single shot autocorrelator?
26 October 2017 5,639 5 View
I needed to find out what is the relationship between the quantum efficiency of photoluminescence and electroluminescence. In other words I wanted to know that if I do optical pumping and measure...
23 October 2017 10,217 1 View
I am determining a phenomenological model for the extraction process of oil from oilseeds.
19 October 2017 9,671 1 View
We use a PDMS transfer technique, where we exfoliate the black phosphorus on the PDMS first and then dry transfer it to SiO2/Si substrate.
17 October 2017 5,838 3 View
How the optical and electronic band gaps are different?
15 October 2017 9,238 3 View