Amplitude-modulation sideband injection locking characteristics of semiconductor lasers and their application

Amplitude-modulation (AM) sideband injection-locking characteristics of 1.3- mu m distributed-feedback lasers are studied experimentally. When the master laser light, which is amplitude-modulated, is injected into slave lasers, the slave lasers can be phase-locked to each sideband of the master laser. This means that the frequency separation between slave lasers can be controlled by the modulation frequency of the master laser. By controlling the injection power, it is possible to achieve a very stable AM sideband injection-locked state of slave lasers. Results on phase-noise and phase-modulation measurements, the frequency stabilization between two channels, and the injection locking to a short pulse are presented. On the basis of the experimental results, an example for designing the multifrequency laser transmitter by means of the AM sideband injection-locking and the mode-locking techniques is described. >

[1]  Paolo Spano,et al.  Frequency and intensity noise in injection-locked semiconductor lasers: Theory and experiments , 1986 .

[2]  Kiyoshi Nosu,et al.  Coherent FDM transmission techniques , 1987 .

[3]  S. Kobayashi,et al.  Optical phase modulation in an injection locked AlGaAs semiconductor laser , 1982 .

[4]  R. Braun,et al.  Coherent optical-fibre subscriber line , 1985 .

[5]  L. Kazovsky.  Multichannel coherent optical communications systems , 1987 .

[6]  Automatic frequency control in a semiconductor laser and an optical amplifier , 1983 .

[7]  G. Burdge,et al.  The linewidth of a mode-locked semiconductor laser caused by spontaneous emission: Experimental comparison to single-mode operation , 1986 .

[8]  H. F. Taylor,et al.  FM sideband injection locking of diode lasers , 1982 .

[9]  T. Okoshi,et al.  Degradation of bit-error rate in coherent optical communications due to spectral spread of the transmitter and the local oscillator , 1984 .

[10]  Effective bandwidth for FM noise suppression in an injection-locked semiconductor laser , 1985 .

[11]  Yoshihisa Yamamoto,et al.  Direct frequency modulation in AlGaAs semiconductor lasers , 1982 .

[12]  Spurious AM and FM in FM sideband Injection locking of a laser diode , 1987 .

[13]  K. Kikuchi,et al.  Amplitude modulation of an injection-locked semiconductor laser for heterodyne-type optical communications. , 1984, Optics letters.

[14]  T. Okoshi,et al.  Heterodyne and Coherent Optical Fiber Communications: Recent Progress , 1982 .

[15]  P. Gallion,et al.  Output spectrum of an unlocked optically driven semiconductor laser. , 1986, Optics letters.

[16]  N. A. Olsson,et al.  Locking range and stability of injection locked 1.54 µm InGaAsp semiconductor lasers , 1985 .

[18]  R. Lang,et al.  Injection locking properties of a semiconductor laser , 1982 .