FM OSCILLATION OF THE He-Ne LASER

Harris, S. E.; Targ, Russell

doi:10.1063/1.1723588

Cited by 96 publications

(22 citation statements)

References 4 publications

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“…Hargrove, Fork, and Pollack [16] experimentally obtained a train of pulses from an He-Ne laser by mode-locking with an internal acoustic loss modulator. Harris and Targ [17] used an internal frequency modulator to mode-lock the same laser, resulting in a frequency-modulated output. In the following years, the techniques of mode-locking were demonstrated in other laser systems, including the argon ion laser [7], the ruby laser [4], and the neodymium-doped yttrium aluminum garnet (Nd:YAG) laser [6].…”

Section: Introductionmentioning

confidence: 99%

Pulse Dynamics in an Actively Mode-Locked Laser

Geddes

Firth²,

Black³

2003

SIAM J. Appl. Dyn. Syst.

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Abstract. We consider pulse formation dynamics in an actively mode-locked laser. We show that an amplitudemodulated laser is subject to large transient growth and we demonstrate that at threshold the transient growth is precisely the Petermann excess noise factor for a laser governed by a nonnormal operator. We also demonstrate an exact reduction from the governing PDEs to a low-dimensional system of ODEs for the parameters of an evolving pulse. A linearized version of these equations allows us to find analytical expressions for the transient growth below threshold. We also show that the nonlinear system collapses onto an appropriate fixed point, and thus in the absence of noise the ground-mode laser pulse is stable. We demonstrate numerically that, in the presence of a continuous noise source, however, the laser destabilizes and pulses are repeatedly created and annihilated.

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Section: Introductionmentioning

confidence: 99%

Pulse Dynamics in an Actively Mode-Locked Laser

Geddes

Firth²,

Black³

2003

SIAM J. Appl. Dyn. Syst.

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“…Substituting for IT and E their expansion according to (6) and using (3) Equations (51) and (52) are the equations .of motion for the pb's and pB's. By substituting for p o and qb from (15), we obtain, after some rearrangement,, the following equations for the normal mode amplitudes:…”

Section: = X E~ ( T )mentioning

confidence: 99%

“…In the following analysis we will make the adiabatic approximation r i b << jw$, and neglect the terms involving D 6 and D,"b on the right side of (30). We are now in a position to derive the equations pertaining to specific situations.…”

Section: (8) Amentioning

confidence: 99%

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Parametric interactions of optical modes

Yariv

1966

IEEE J. Quantum Electron.

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“…The relative amplitudes of the sideband pairs are given by a Bessel function [28] that depends on the modulation power (amplitude of the driving modulation). All frequencies are not present simultaneously; the output frequency sweeps through the bandwidth of the comb of modes at the modulation frequency [28], [29]. The accompanying amplitude (power) modulation manifests itself as an asymmetry in the sideband pairs [30].…”

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confidence: 99%

Nonlinear dynamics of a laser diode with optical feedback systems subject to modulation

Lawrence

Kane

2002

IEEE J. Quantum Electron.

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Abstract-The nonlinear dynamic behavior of a direct frequency-modulated diode laser with strong optical feedback is examined and compared to a laser diode subject to electro-optically modulated, strong optical feedback. Direct modulation is achieved by sinusoidal modulation of the diode laser injection current. Electro-optic modulation is achieved by applying a sinusoidal voltage to an intracavity phase modulating element. The output state (characterized by the output power versus time, the intensity noise spectrum and the optical frequency spectrum) for both types of modulation is dependent on the ratio of the modulation frequency to the external cavity resonant frequency, and the modulation power. A number of distinct states are observed: conventional amplitude modulation (with FM spectra); multimode, low-noise amplitude modulation; multimode, high-noise amplitude modulation; periodic limit-cycle operation; quasi-periodicity; chaos; low-frequency fluctuations; and mode-locking. There are significant differences between the direct and electro-optic frequency-modulation cases. The onset of the dynamic instability is characterized as a noisy period-one oscillation for direct modulation and a low-frequency fluctuation for intracavity electro-optic modulation. Phase portraits produced experimentally with the use of a digital phosphor oscilloscope are shown to agree well with those constructed from output power versus time data. This represents an experimental method for examining the dynamics phase portraits in real-time.

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FM OSCILLATION OF THE He-Ne LASER

Abstract: At room temperature a 1.3% Nd: Y AG crystal had a pulsed threshold of 1.0 J and cw thresholds of

Cited by 96 publications

References 4 publications

Pulse Dynamics in an Actively Mode-Locked Laser

Pulse Dynamics in an Actively Mode-Locked Laser

Parametric interactions of optical modes

Nonlinear dynamics of a laser diode with optical feedback systems subject to modulation

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