- #1
cyrylabidi
- 6
- 0
Hi,
i have found a formula (in Waveguide Loss Measurement Using the Reflection Spectrum, PHOTONICS TECHNOLOGY LETTERS, VOL. 20, NO. 16, 2008) to calculate losses in semiconductor structures such as waveguide. I want to compare the result with another method (described in Photonic crystal waveguides with propagation losses in the 1 dB/mm range, J. Vac. Sci. Technol. B 22(6), Nov/Dec 2004) but from 1st method i get cm^-1 while from 2nd dB. I also have found (i can't remember where) that:
10 cm^-1 = 10 dB,
100 cm^-1 = 20 dB
so
[tex]\alpha [dB] = 10*log \alpha [cm^{-1}] [/tex].
It is correct? Can anybody confirm this, or say what is wrong.
I woluld appreciate yours help.
cyrylabidi
i have found a formula (in Waveguide Loss Measurement Using the Reflection Spectrum, PHOTONICS TECHNOLOGY LETTERS, VOL. 20, NO. 16, 2008) to calculate losses in semiconductor structures such as waveguide. I want to compare the result with another method (described in Photonic crystal waveguides with propagation losses in the 1 dB/mm range, J. Vac. Sci. Technol. B 22(6), Nov/Dec 2004) but from 1st method i get cm^-1 while from 2nd dB. I also have found (i can't remember where) that:
10 cm^-1 = 10 dB,
100 cm^-1 = 20 dB
so
[tex]\alpha [dB] = 10*log \alpha [cm^{-1}] [/tex].
It is correct? Can anybody confirm this, or say what is wrong.
I woluld appreciate yours help.
cyrylabidi