Naim Ahmed

6 Questions 10 Answers 0 Followers

Questions related from Naim Ahmed

What is the difference between loaded vs unloaded quality factor for optical microring resonator?

How to calculated the intrinsic or unloaded Q from the loaded Q or transmission spectrum? How can i convert loss coefficient ( cm-1) into dB?

18 April 2018 5,652 1 View

How to calculate the coupling coefficient parameters of a microring resonator?

Hello, I want to analytically calculate the coupling coefficient value of my micro-ring resonator. My ring size is known. I can also extract the FSR, FWHM value from my transmission spectrum. Is...

21 August 2017 3,447 4 View

How to get rid of residual photoresist after pattern developing from the waveguide channel?

I am trying to fabricate a ring structure using deep UV. But the problem is I couldn't resolve the ring as I have some photoresist left between the straight and ring waveguide after development. I...

22 June 2017 932 4 View

Coupling between V grooves micromirror and photodiode on chip. Can anyone help?

Does anybody have experience with v-groove array coupling with photodiodes on the chip? I need to couple the laser light from V-grooves to the 30um photodiode. I already tried once using...

30 August 2016 6,574 2 View

How to protect my Hard Mask (SiN) for creating V grooves on Silicon wafer?

Hi I am trying to fabricate V-grooves on Si(100) wafer. I develop SiN Hard mask using PECVD as a protective layer. But during my KOH etching (30% KOH with IPA at 80deg) my hard mask is completely...

20 April 2016 7,621 9 View

How can I model unit cell in quantum espresso?

I want to made a Nitrogen vacancy center in diamond using quantum espresso?

04 January 2016 7,443 6 View