Abstract

We report a digital space optical communication system with new features both in the transmitting and in the receiving ends. The diode laser source is stabilized to within ±100 kHz by locking its frequency to the transmission peak of a Faraday anomalous dispersion optical filter (FADOF). The optical filter in the receiver uses two FADOF’s that are linked to eliminate the multipeak structure and achieve a single-peak bandwidth of ~1 GHz. The detection sensitivity of this system is 23 times higher than that of a system with a traditional interference filter.

© 1995 Optical Society of America

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References

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  1. D. J. Dick, T. M. Shay, “Ultrahigh-noise rejection optical filter,” Opt. Lett. 16, 867–869 (1991).
    [CrossRef] [PubMed]
  2. P. Yufeng, T. Junxiong, W. Qingji, “Study of Faraday anomalous dispersion spectra of the hyperfine structure of Rb D2 line,” Acta Phys. Sin. 2, 1–8 (1993).
  3. P. K. Cheo, Fiber Optics and Optoelectronics, 2nd ed. (Prentice-Hall, Englewood Cliff, N.J., 1990). Chap. 12, p. 344; Chap. 13, pp. 389, 394.

1993 (1)

P. Yufeng, T. Junxiong, W. Qingji, “Study of Faraday anomalous dispersion spectra of the hyperfine structure of Rb D2 line,” Acta Phys. Sin. 2, 1–8 (1993).

1991 (1)

Cheo, P. K.

P. K. Cheo, Fiber Optics and Optoelectronics, 2nd ed. (Prentice-Hall, Englewood Cliff, N.J., 1990). Chap. 12, p. 344; Chap. 13, pp. 389, 394.

Dick, D. J.

Junxiong, T.

P. Yufeng, T. Junxiong, W. Qingji, “Study of Faraday anomalous dispersion spectra of the hyperfine structure of Rb D2 line,” Acta Phys. Sin. 2, 1–8 (1993).

Qingji, W.

P. Yufeng, T. Junxiong, W. Qingji, “Study of Faraday anomalous dispersion spectra of the hyperfine structure of Rb D2 line,” Acta Phys. Sin. 2, 1–8 (1993).

Shay, T. M.

Yufeng, P.

P. Yufeng, T. Junxiong, W. Qingji, “Study of Faraday anomalous dispersion spectra of the hyperfine structure of Rb D2 line,” Acta Phys. Sin. 2, 1–8 (1993).

Acta Phys. Sin. (1)

P. Yufeng, T. Junxiong, W. Qingji, “Study of Faraday anomalous dispersion spectra of the hyperfine structure of Rb D2 line,” Acta Phys. Sin. 2, 1–8 (1993).

Opt. Lett. (1)

Other (1)

P. K. Cheo, Fiber Optics and Optoelectronics, 2nd ed. (Prentice-Hall, Englewood Cliff, N.J., 1990). Chap. 12, p. 344; Chap. 13, pp. 389, 394.

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Figures (4)

Fig. 1
Fig. 1

Rb FADOF transmission spectrum.

Fig. 2
Fig. 2

Block diagram of a linked FADOF: G1, G2, G3, Glan–Thompson prisms; B1, B2, longitudinal magnetic fields; T1, T2, temperatures; L1, L2, lengths.

Fig. 3
Fig. 3

Experimental transmission spectrum of a linked FADOF: B 1 = 114 G, T 1 = 80 °C, L 1 = 4.7 cm; B 2 = 276 G, T 2 = 70°C, L 2 = 5.1 cm.

Fig. 4
Fig. 4

Block diagram of the digital space optical communication system. Transmitter (a): 1, LD; 2, beam splitter; 3, FADOF; 4, photoelectric detector; 5, modulation signal generator; 6, servo-loop; 7, computer system; 8, interface circuit; 9, acousto-optical modulator; 10, transmitting telescope. Receiver (b): 1, receiving telescope; 2, collimator; 3, linked FADOF; 4, photoelectric detector; 5, signal preprocessing circuit; 6, computer system.

Equations (3)

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SNR = ( e η T P s h ν ) 2 2 e 2 η b h ν ( T P s + n B T ) + 4 K B T r b R L ,
BER = e r f c ( SNR ) .
P smin 1 P smin 2 = ( B 1 T 2 B 2 T 1 ) 1 / 2 ,

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