Optical systems with one or more stabilized laser signal sources

Details Optical systems with one or more stabilized laser signal sources Optical systems with one or more stabilized laser signal sources

1997-11-26

2000-08-01

Negash, Kinfe-Michael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359125, 359111, 359110, 359167, H04B 1000

Patent

active

060975237

ABSTRACT:
Optical stabilization system having a signal source (1) connected to a transmission line (2) and a noise source (3). The signal source (1) comprises a laser having a number of laser modes within a first wavelength band for generating an optical transmission signal (S). The noise source generates a narrow-band noise signal which is inserted into the transmission line via coupling means (5) and is injected into the laser of the signal source (1). The noise signal forces the laser to operate in a laser mode within the noise band. Via a power distributor (11), a portion of the noise signal can also be injected into a laser of a further signal source (9) for stabilization in a laser mode within the same noise band. Any signals outside the noise band are removed from the transmission signal by a narrow-band filter (8). The stabilization system is applied in passive optical networks for groupwise wavelength assignment to network terminals.

REFERENCES:
patent: 4635246 (1987-01-01), Taylor et al.
patent: 5401955 (1995-03-01), Van Den Brink
patent: 5598288 (1997-01-01), Collar
patent: 5892607 (1999-04-01), Atlas
Finn Mogensen, et al. "Locking Conditions and Stability Properties for a Semiconductor Laser with External Light Injection", IEEE Journal of Quantum Electronics, vol. QE-21, No. 7, Jul. 1985, pp. 784-793.
M.. R.. Surette, et al.: "Effects of Noise on Transients of Injection Locked Semiconductor Lasers", IEEE Journal of Quantum Electronics, vol. 29, No. 4, Apr. 1993, pp. 1046-1062.

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