Deep‐level trap model of diode laser modulation: Significance of spontaneous emission and gain saturation

AbstractThe minimum irradiance needed to overcome amplified spontaneous emission (ASE) of a seed beam injected into a laser amplifier is evaluated. The treatment is particularly applicable to extreme ultraviolet (EUV) and X-ray laser schemes to inject laser harmonic radiation as a seed into (1) plasma laser amplifiers and (2) free-electron lasers. Simple expressions and calculations are given for the minimum injected irradiance required for amplification of the injected seed beam to exceed ASE from the amplifier, including the effects of gain saturation, assuming one dimensional radiative transfer.

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Amplified spontaneous emission and gain‐saturation nonlinearity in high‐gain optical amplifiers: The biased amplifier

Journal of Applied Physics ◽

10.1063/1.323364 ◽

1977 ◽

Vol 48 (1) ◽

pp. 238-242 ◽

Cited By ~ 10

Author(s):

J. B. Moreno ◽

G. A. Fisk ◽

J. M. Hoffman

Keyword(s):

Spontaneous Emission ◽

Optical Amplifiers ◽

Amplified Spontaneous Emission ◽

High Gain ◽

Gain Saturation ◽

Saturation Nonlinearity

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Measurement of spontaneous emission spectra of diode laser structures

LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242) ◽

10.1109/leos.2001.968984 ◽

2002 ◽

Author(s):

G.M. Lewis ◽

P.M. Smowton ◽

J.D. Thomson ◽

H.D. Summers ◽

P. Blood

Keyword(s):

Diode Laser ◽

Spontaneous Emission ◽

Emission Spectra

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COHERENCE AND SYNCHRONIZATION IN DIODE-LASER ARRAYS WITH DELAYED GLOBAL COUPLING

International Journal of Bifurcation and Chaos ◽

10.1142/s021812749900167x ◽

1999 ◽

Vol 09 (11) ◽

pp. 2225-2229 ◽

Cited By ~ 31

Author(s):

JORDI GARCÍA-OJALVO ◽

JOAN CASADEMONT ◽

M. C. TORRENT ◽

CLAUDIO R. MIRASSO ◽

J. M. SANCHO

Keyword(s):

Semiconductor Laser ◽

Diode Laser ◽

Spontaneous Emission ◽

Coupling Strength ◽

Chaos Synchronization ◽

Laser Array ◽

Laser Arrays ◽

Feedback Strength ◽

Global Coupling ◽

Phase Solution

The dynamics of a semiconductor-laser array whose individual elements are coupled in a global way through an external mirror is numerically analyzed. A coherent in-phase solution is seen to be preferred by the system at intermediate values of the feedback-coupling strength. At low values of this parameter, a strong amplification of the spontaneous emission noise is observed. A tendency towards chaos synchronization is also observed at large values of the feedback strength.

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