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Increasing the density of modes in an optical frequency comb by cascaded four-wave mixing in a nonlinear optical fiber

Karki, Khadga Jung LU (2017) In Physical Review A 96.
Abstract
Here, it is shown that when two optical frequency combs with identical mode spacing but different offset frequencies copropagate through a nonlinear optical fiber, four-wave mixing between them generates new modes. Although the spacings between the new modes depend on the difference of the offset frequencies, they appear irregular because of the large number of possible four-wave-mixing processes. However, when the difference in the offset frequencies is an integer fraction of the mode spacing of the original combs, the cascaded four-wave mixing generates a new comb with a fixed mode spacing given by the difference in the offset frequencies. This process can be used to substantially increase the mode density of a frequency comb. The method... (More)
Here, it is shown that when two optical frequency combs with identical mode spacing but different offset frequencies copropagate through a nonlinear optical fiber, four-wave mixing between them generates new modes. Although the spacings between the new modes depend on the difference of the offset frequencies, they appear irregular because of the large number of possible four-wave-mixing processes. However, when the difference in the offset frequencies is an integer fraction of the mode spacing of the original combs, the cascaded four-wave mixing generates a new comb with a fixed mode spacing given by the difference in the offset frequencies. This process can be used to substantially increase the mode density of a frequency comb. The method can be used in conjunction with new sources of frequency combs, such as quantum cascade lasers and microresonators, which have large mode spacing of tens of GHz. Decreasing the mode spacing of such sources is likely to increase their applicability. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review A
volume
96
publisher
American Physical Society (APS)
external identifiers
  • scopus:85031314888
  • wos:000412027400006
ISSN
1050-2947
DOI
10.1103/PhysRevA.96.043802
language
English
LU publication?
yes
id
a8f0ed56-21f6-41fb-9bdb-009965a2cb4e
date added to LUP
2017-10-25 14:17:08
date last changed
2018-04-01 04:36:21
@article{a8f0ed56-21f6-41fb-9bdb-009965a2cb4e,
  abstract     = {Here, it is shown that when two optical frequency combs with identical mode spacing but different offset frequencies copropagate through a nonlinear optical fiber, four-wave mixing between them generates new modes. Although the spacings between the new modes depend on the difference of the offset frequencies, they appear irregular because of the large number of possible four-wave-mixing processes. However, when the difference in the offset frequencies is an integer fraction of the mode spacing of the original combs, the cascaded four-wave mixing generates a new comb with a fixed mode spacing given by the difference in the offset frequencies. This process can be used to substantially increase the mode density of a frequency comb. The method can be used in conjunction with new sources of frequency combs, such as quantum cascade lasers and microresonators, which have large mode spacing of tens of GHz. Decreasing the mode spacing of such sources is likely to increase their applicability.},
  articleno    = {043802},
  author       = {Karki, Khadga Jung},
  issn         = {1050-2947},
  language     = {eng},
  month        = {10},
  publisher    = {American Physical Society (APS)},
  series       = {Physical Review A},
  title        = {Increasing the density of modes in an optical frequency comb by cascaded four-wave mixing in a nonlinear optical fiber},
  url          = {http://dx.doi.org/10.1103/PhysRevA.96.043802},
  volume       = {96},
  year         = {2017},
}