NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Measurement of 13CH4/12CH4 Ratios in Air Using Diode-Pumped 3.3 υm Difference-Frequency Generation in PPLN
Published
Author(s)
S Waltman, K P. Petrov, E J. Dlugokencky, M Arbore, M M. Fejer, F K. Tittel, Leo W. Hollberg
Proceedings Title
IEEE Summer Topicals
Conference Dates
August 13-15, 1997
Conference Location
Quebec, 1, CA
Conference Title
Proc. Advanced Semiconductor Lasers and Applications - IEEE Summer Topicals
Pub Type
Conferences
Citation
Waltman, S.
, Petrov, K.
, Dlugokencky, E.
, Arbore, M.
, Fejer, M.
, Tittel, F.
and Hollberg, L.
(1997),
Measurement of <sup>13</sup>CH<sub>4</sub>/<sup>12</sup>CH<sub>4</sub> Ratios in Air Using Diode-Pumped 3.3 υm Difference-Frequency Generation in PPLN, IEEE Summer Topicals , Quebec, 1, CA
(Accessed October 10, 2025)