Izzati Ismail

11 Questions 2 Answers 0 Followers

Questions related from Izzati Ismail

In semiconductor, for annealing, if high temperature, resistance will be high/low? whats the other effect if temperature is high?

the temperature is high suspected during annealing. I have NPN transistor for BICMOS circuit. The delta feedback resistance if high. suspect the high delta feedback resistance is due to annealing...

29 December 2016 9,413 6 View

Is it significant to have fiber tip lens for RI sensor application?

I have a sensor made up of fiber with a convex lens at the fiber tip. I want to test for refractive index measurement. By having the lens, what will the response be? better in sensitivity? Is it...

15 July 2016 3,113 1 View

How to calculate reflectivity of convex lens?

the formula to calculate reflectivity like bragg mirror model and fresnel consider refractive index of a material in order to define the reflectivity. but it does not state whether the curvature...

23 February 2016 8,349 2 View

What cause the fringe visibility of the output power to be low?

I am analyzing an output intensity response of fringes interference pattern. I calculate the fringe visibility and it shows low value. My tested sensor design has a convex lens and flat mirror as...

24 January 2016 9,774 3 View

What is the available technique used for fabricating micro-convex lens at the fiber tip?

I want to fabricate micro-convex lens at the fiber tip? what is the available technique that is easy. for example, etching, Uv curing etc...

13 August 2015 1,691 2 View

What can be used in displacement sensor experimnt setup to change displacement in micrometer range?

In order to analyze the displacement, an equipment that control the amount of displacement has to be used in the setup. Example, xyz translational stage. But this one limited to milli metre...

08 April 2015 7,958 7 View

What is the output that can be viewed using OSA?

I want to check reflectivity of a mirror using OSA and then plot the graph of reflectivity (%) vs wavelength(nm). Can I do it using OSA or I have to calculate reflectivity from the output power...

30 March 2015 2,893 1 View

What is the refractive index for germanium doped multimode?

In my lab, I have 62.5/125um multimode and also 50/125um with orange jacket. I want to do splicing and I have to measure reflectance at the joint. For that, I need to be clear on the refractive...

10 March 2015 6,103 2 View

What is the formula used to calculate reflectivity for bragg mirror?

I followed this formula to calculate my reflectivity: http://en.wikipedia.org/wiki/Distributed_Bragg_reflector But the problem is I don't know which parameters refer to which. I am now using...

03 March 2015 637 3 View

What is the advantage of using the bragg mirror?

Instead of using the metallic mirror, why it is preferred to use bragg mirror in interferometer experiment setup?

02 March 2015 4,389 4 View

Is there any other method to measure displacement for an actuator besides using a CCD camera?

example broadband source interferometer, surface profiler, microscope. If there is, may I know the experiment setup and how to measure the displacement when different values of voltages are applied?

26 February 2015 6,694 5 View