The Origin Forum
File Exchange
Try Origin for Free
The Origin Forum
Home | Profile | Register | Active Topics | Members | Search | FAQ | Send File to Tech support
Username:
 Password:
Save Password
Forgot your Password? | Admin Options

 All Forums
 Origin Forum
 Origin Forum
 Why THz absorption coefficient measured in cm-1		  New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic Lock Topic Edit Topic Delete Topic New Topic Reply to Topic

waveguidethz

7 Posts
Posted - 03/16/2013 :  06:39:18 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
To measure the absorption coefficient, a commercially available THz time-domain spectrometer can be used.

According to this paper ¡§Terahertz Waveguides and Materials¡¨ http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4222223
Terahertz absorption coefficients are measured in cm-1.

But why? What Ive learned before is that attenuation coefficients are normally measured in dBcm-1.

So are they different? Or just the same?

Sam Fang

292 Posts
Posted - 03/18/2013 :  06:19:00 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
1/cm used the natural logarithm to compute the ratio.

It can be converted as:

1/cm = 10*log(e) dB/cm = 4.34 dB/cm


Sam
OriginLab Technical Services
Edited by - Sam Fang on 03/18/2013 06:27:51 AM
Go to Top of Page
  Previous Topic Topic Next Topic Lock Topic Edit Topic Delete Topic New Topic Reply to Topic
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
The Origin Forum © 2020 Originlab Corporation Go To Top Of Page
Snitz Forums 2000