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Author
Hocker, L. O.
;
Sokoloff, D. R.
;
Daneu, V.
;
Szoke, A.
;
Javan, A.
Title
Frequency mixing in the infrared and far-infrared using a metal-to-metal point contact diode
Type
Journal Article
Year
1968
Publication
Applied Physics Letters
Abbreviated Journal
Appl Phys Lett
Volume
12
Issue
12
Pages
Keywords
optical antennas
Abstract
Metalâ€toâ€metal point contact diodes were used to obtain the 54â€GHz beat notes between two adjacent 10.6â€μ CO2 laser transitions. The speed of the diodes in the farâ€infrared is at least 1000 GHz. This was tested with a 337â€μ HCN laser.
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Approved
no
Call Number
RPLAB @ gujma @
Serial
742
Permanent link to this record
Author
Baryshev A.
;
Hovenier J.N.
;
Adam A.J.L.
;
Kašalynas I.
;
Gao J.R.
;
Klaassen T.O.
;
Williams B.S.
;
Kumar S.
;
Hu Q.
;
Reno J.L.
Title
Phase locking and spectral linewidth of a two-mode terahertz quantum cascade laser
Type
Journal Article
Year
2006
Publication
Physics Letters
Abbreviated Journal
Volume
89
Issue
Pages
Keywords
Abstract
We have studied the phase locking and spectral linewidth of an ~ 2.7 THz quantum cascade laser by mixing its two lateral lasing modes. The beat signal at about 8 GHz is compared with a microwave eference by applying conventional phase lock loop circuitry with feedback to the laser bias current. Phase locking has been demonstrated, resulting in a narrow beat linewidth of less than 10 Hz. Under requency stabilization we find that the terahertz line profile is essentially Lorentzian with a minimum linewidth of ~ 6.3 kHz. Power dependent measurements suggest that this linewidth does not approach the Schawlow-Townes limit.
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RPLAB @ atomics90 @
Serial
967
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