Optics

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Questions related to Optics

Can Laser Beam Profiler measure power of laser beam?

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 3,149 3 View

How easy and costly is it to build a titanium-sapphire laser amplifier for 100 femtosecond pulses. Desired repetition rate 1 KHz. Costs?

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 7,527 6 View

Why a multimode fiber can not be used to realize mode-locking?

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 9,275 3 View

Autocorrelation for ultrashort optical pulses?

What is the difference in the designs of the regular Michelson Interferrometer autocorrelator and the single shot autocorrelator?

26 October 2017 5,558 5 View

What is the relationship between the quantum efficiency of photoluminescence and electroluminescence?

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 10,142 1 View

Someone has characterized the structure of oilseeds using optical microscopy?

I am determining a phenomenological model for the extraction process of oil from oilseeds.

19 October 2017 9,586 1 View

Why does AFM of our exfoliated few-layer black phosphorus show a thickness of 5-6 nm, while it should be less than 2nm based on optical measurements?

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 5,739 3 View

How the optical and electronic band gaps are different?

How the optical and electronic band gaps are different?

15 October 2017 9,136 3 View

Is there any geostationary satellite available which provide hourly data on aerosol optical depth especially over South Asia?

Wish to get hourly profile of AOD from satellite over Indo gangetic plain in south Asia

15 October 2017 5,907 3 View

Looking for a gas-permeable, water-immersion compatible, glass-like optics - coverslips. Any suggestions?

to perform long-term imaging on tissues

13 October 2017 2,438 4 View

How can I make a high quality Reflective Neutral Density (ND) Filter?

As you know, Reflective ND filters consist of metallic thin film optical coatings. In the first step, I am looking for which metallic material is better use for deposition? In the Second step, I...

10 October 2017 1,427 4 View

How the use of dual FSO channels using power splitter and combiner helpful and is it different from WDM of dual optical links?

Please also explain the difference of using Dual FSO channels in parallel and in series and how it is different from wavelength division multiplexing of optical links. And which one can be used...

09 October 2017 4,672 2 View

What is the role of every types of lasers in optical communication ?

what is the role of every types of lasers in optical communication ? and how does it work ? 

01 October 2017 5,484 3 View

What is difference between optical and thermal concentration?

What is basic difference between optical and thermal concentration and what are the applications where optical or thermal concentration are used? 

01 October 2017 4,112 5 View

Why should we measure the optical rotation by polarimeter within 30min. after preparation of sample?

Is there any chance of formation of other isomers.please clarify.

28 September 2017 468 2 View

Hyperopic eye with posterior scleral staphyloma, is it possible?

We all known that Posterior staphylomas are more commonly congenital (at birth) or as a manifestation of more extreme myopia (nearsightedness). The congenital staphylomas occur near the optic disc...

27 September 2017 7,339 6 View

Optical limiting effect?

Dear Colleagues, I'm studying the optical limiting effect in organic material due to reverse saturation absorption. As we know, in reverse saturation absorption, the transmission coefficient...

23 September 2017 1,230 4 View

How is that when an input of 1V is provided to Photonic crystal based splitter gives an output voltage greater than input (Output as 1.2 V)?

After designing an optical splitter using photonic crystals with four equal and symmetric ports using ring resonator, I am getting output to be greater than input voltage provided (output is the...

21 September 2017 6,046 8 View

Rings in self-defocusing effect ?

Dear Colleagues, I'm studying self-defocusing effect in organic material. In the light beam on the screen, I observe the rings like attached images. Is this the result of diffraction? What is the...

21 September 2017 6,309 18 View

Is there a camera that can simulate the human eye in terms of field of view, f# and focal length?

I know that the human eye is a complex system but I would like to know if there are or if is it possible to create a camera which can simulate the human eye in terms of focusing the objects and...

20 September 2017 8,806 4 View

How the optical property will modify based on penn energy?

For single crystal

19 September 2017 1,855 1 View

How to make small FOV collimator?

I have a sensor and I want to make really small FOV, like 0.1 degree.So, I use lens, which focus light into pinhole. So FOV is Tan(D/f)^-1, where D is pinhole size, f is focal length. It means, If...

19 September 2017 4,082 3 View

Direction of vector P and vector E in isotropic and anisotropic medium?

Dear Colleagues, From relation:  P=ε_0 χ^((1)) E I suppose that in an isotropic medium,  χ^((1)) is the scalar quantity, vector P and E are in the same direction, while for an anisotropic medium,...

18 September 2017 5,172 4 View

Nonlinear part in refractive index?

Dear Colleagues, I am studying a third order nonlinear optical organic material with a negative nonlinear refractive index, but the total refractive index is positive (n=n0+n2I, n2

18 September 2017 4,542 2 View

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