Optical phase modulation in an injection locked alga as semiconductor laser

Journal Article · Fri Oct 01 04:00:00 EDT 1982 · IEEE Trans. Microwave Theory Tech.; (United States)

DOI:https://doi.org/10.1109/TMTT.1982.1131304· OSTI ID:5611745

Kobayashi, S; Kimura, T

Optical phase modulation obtained by injecting coherent CW light into a directly frequency-modulated semiconductor laser is reported. Phase modulation at up to a 1 GHz modulation frequency has been obtained without compression for a 1.4 GHz half locking bandwidth. Phase deviation can be represented by the ratio of the original FM deviation to the locking half bandwidth. The phase deviation normalized by the frequency deviation is inversely proportional to the cutoff modulation frequency. A static phase shift of ..pi.. took place with a 0.48 mA drive current change in the injection locked laser. Reduction in FM noise by means of CW light injection and FM noise accumulation in cascaded injection locked laser amplifiers are discussed, together with the optimum design for an injection locked repeater system.

• Research Organization: Mushashino Electrical Comm. Lab.
• OSTI ID: 5611745
• Journal Information: IEEE Trans. Microwave Theory Tech.; (United States), Journal Name: IEEE Trans. Microwave Theory Tech.; (United States) Vol. MTT-30:10; ISSN IETMA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
AMPLIFIERS
BEAM DYNAMICS
BEAM INJECTION
COHERENT RADIATION
DESIGN
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
EQUIPMENT
FREQUENCY MODULATION
LASERS
LINE WIDTHS
MODULATION
OPTICAL MODES
OSCILLATION MODES
OSCILLATIONS
PHASE OSCILLATIONS
PHASE SHIFT
RADIATIONS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR LASERS
SIGNAL-TO-NOISE RATIO