Cavity resonance shift and bandwidth enhancement in semiconductor lasers with strong light injection

Murakami, Atsushi; Kawashima, Kenji; Atsuki, K.

doi:10.1109/jqe.2003.817583

Cited by 232 publications

(164 citation statements)

References 20 publications

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“…This enhancement has been predicted theoretically, based on rate equation simulations [10]. Recently, Murakami et al [12] provided a simple physical picture of the enhancement process. Under optical injection locking, the slave laser is forced to oscillate at the master laser frequency and not at the cavity mode.…”

Section: Introductionmentioning

confidence: 74%

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Optical Properties and Modulation Characteristics of Ultra-Strong Injection-Locked Distributed Feedback Lasers

Sung

Lau

2007

IEEE J. Select. Topics Quantum Electron.

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Abstract-The optical properties and the frequency responses of ultrastrong (injection ratio > 10 dB) injection-locked distributed feedback lasers are investigated experimentally and theoretically. We have observed three distinctive modulation regimes under different frequency detuning between the master and the slave lasers. At large negative frequency detuning, the laser exhibits enhanced modulation efficiency at low frequencies. At intermediate frequency detuning, a flat frequency response with large 3 dB bandwidth is observed. At large positive frequency detuning, the modulation response shows a pronounced resonance peak at high frequencies. These phenomena can be explained by the resonance enhancement of the slave laser cavity mode, with the resonance frequency equal to the difference between the injection-locked frequency and the cavity mode. The experimental results agree well with theoretical calculations based on three coupled rate equations. Depending on the applications, the injection locking conditions can be optimized to achieve high RF link gain, broadband, or high resonance frequency operations.

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Section: Introductionmentioning

confidence: 74%

“…2(c), the wavelength of the cavity mode is shifted to longer wavelength compared with the original wavelength of the free-running slave laser. This results from the carrier density-dependent refractive index change in the injection-locked laser [12], [22]. The injection of photon from the master laser depletes the carrier in the slave laser.…”

Section: Resultsmentioning

confidence: 99%

Optical Properties and Modulation Characteristics of Ultra-Strong Injection-Locked Distributed Feedback Lasers

Sung

Lau

2007

IEEE J. Select. Topics Quantum Electron.

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“…The laser was biased above threshold at 1.6 Jth and frequency detuning was of -7.962 GHz. The cutoff frequency can be said to be proportional to the injection strength, and hence modulation response of the laser can be enhanced due to strong optical injection [16]. Modulation response of the semiconductor laser as being dependent on both the operating conditions and optical injection is illustrated in figure 5.…”

Section: Bandwidth Enhancement By Injection Lockingmentioning

confidence: 99%

“…To estimate the modulation response of optically injected semiconductor laser, the rate equations have to be solved again with strong optical injection, a resonance frequency with optical injection formula can be derived as [16]: (16) where is the resonance frequency with optical injection, and is the is phase difference between the slave laser and the master laser.…”

Section: Bandwidth Enhancement By Injection Lockingmentioning

confidence: 99%

Chaotic Dynamics of Semiconductor Lasers for Secure Optical Communication

Azawe¹

2012

Optical Communication

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“…Strong optical injection locking is a promising technique to suppress the nonlinear distortion as well as increase the resonance frequency of directly modulated semiconductor lasers [12][13][14][15][16][17]. The nonlinear distortions are more pronounced near the relaxation oscillation frequency of the laser due to the nonlinear coupling between electrons, photons, and phase difference between master and slave.…”

Section: Fig 2 Schematic Of Distributed Bragg Reflector (Dbr)mentioning

confidence: 99%

Amplitude Modulation Response and Linearity Improvement of Directly Modulated Lasers Using Ultra-Strong Injection-Locked Gain-Lever Distributed Bragg Reflector Lasers

Sung

2008

Journal of the Optical Society of Korea

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Directly modulated fiber-optic links generally suffer higher link loss and larger signal distortion than externally modulated links. These result from the electron-photon conversion loss and laser modulation dynamics. As a method to overcome the drawbacks, we have experimentally demonstrated the RF performance of directly modulated, ultra-strong injection-locked gain-lever distributed Bragg reflector (DBR) lasers. The free-running DBR lasers exhibit an improved amplitude modulation efficiency of 12.4 dB under gain-lever modulation at the expense of linearity. By combining gain-lever modulation with ultra-strong optical injection locking, we can gain the benefits of both improved modulation efficiency from the gain-lever effect, plus improved linearity from injection locking. Using an injection ratio of R=11 dB, a 23.4-dB improvement in amplitude response and an 18-dB improvement in spurious-free dynamic range have been achieved.

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Cavity resonance shift and bandwidth enhancement in semiconductor lasers with strong light injection

Cited by 232 publications

References 20 publications

Optical Properties and Modulation Characteristics of Ultra-Strong Injection-Locked Distributed Feedback Lasers

Optical Properties and Modulation Characteristics of Ultra-Strong Injection-Locked Distributed Feedback Lasers

Chaotic Dynamics of Semiconductor Lasers for Secure Optical Communication

Amplitude Modulation Response and Linearity Improvement of Directly Modulated Lasers Using Ultra-Strong Injection-Locked Gain-Lever Distributed Bragg Reflector Lasers

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