Abstract

A technique is described and experimental evidence presented for obtaining ultrahigh isolation between the optical local oscillator and the transmitter in heterodyne systems. A degree of isolation that results in an equivalent fedback optical signal that is more than 200 dB below the transmitted power level has been achieved.

© 1987 Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |
  • |
  • |

  1. A. Men, M. Rosenberg, Appl. Opt. 22, 873 (1983).
    [CrossRef] [PubMed]
  2. B. Furch, A. L. Schultz, W. R. Leeb, Appl. Opt. 21, 2344 (1982).
    [CrossRef] [PubMed]

1983 (1)

1982 (1)

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (2)

Fig. 1
Fig. 1

Heterodyne transmitter–receiver system. B.S.'s, beam splitters; λ/4 and λ/2, quarter and half waves, respectively.

Fig. 2
Fig. 2

Experimental setup.

Tables (1)

Tables Icon

Table 1 Measured Isolation 10 log(Pc1/PLO), 10 log(Pc2/ PLO)a or 10 log (Pcs/PLO)a

Equations (7)

Equations on this page are rendered with MathJax. Learn more.

V out = K i i in
i LO = ρ P LO ( dc ) ,
i s = 2 ρ P LO P s ( f 2 + f 1 or f 2 f 1 ) ,
i c 1 = 2 ρ P LO P c 1 ( f 1 ) ,
i c 2 = 2 ρ P LO P c 2 ( f 2 ) ,
i c s = 2 ρ P c 1 P c 2 ( f 2 + f 1 or f 2 f 1 ) ,
10 log ( P s min P LO ) 10 log ( P c 1 P LO ) + 10 log ( P c 2 P LO ) ,

Metrics