[asac][almanews] ALMA Memos 435 Released
Stacy Oliver
soliver at NRAO.EDU
Wed Sep 25 17:41:18 EDT 2002
ALMA Memo # 435
A Hybrid Option for the First LOs using Direct Photonic LO Driver
M. Ishiguro, Y. Sekimoto, A. Ueda, S. Iguchi, T. Noguchi (NAOJ)
J. M. Payne, L. R. D'Addario, W. Shillue (NRAO Tucson)
15/09/2002
Keywords: Local Oscillator, Photomixer, Frontend
We propose a hybrid option for the first local oscillators (LOs) of ALMA
in which a direct photonic LO driver is used to drive cold multipliers.
The photomixer using NTT uni-travelling carrier photodiode has been demonstrated to have high power of 2 m W at 100 GHz and low
amplitude noise of $< 7 - 17$ K/$\mu$W in the frequency range of $98 - 105$ GHz. This option simplifies the LO part of the cartridge
in the baseline ALMA and retains a future possibility for a direct photonic option.
View a pdf version of ALMA Memo #435.
http://alma.aoc.nrao.edu/memos/html-memos/alma435/memo435.pdf
Download a postscript version of ALMA Memo #435.
http://alma.aoc.nrao.edu/memos/html-memos/alma435/memo435.ps
_______________________________________________
Almanews mailing list
Almanews at listmgr.cv.nrao.edu
http://listmgr.cv.nrao.edu/mailman/listinfo/almanews
More information about the Asac
mailing list