Chirp reduction of directly modulated semiconductor lasers at 10 Gb/s by strong CW light injection

Mohrdiek, S.; Burkhard, H.; Walter, H.

doi:10.1109/50.285323

Cited by 102 publications

(37 citation statements)

References 16 publications

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“…Chirp reduction under optical injection has been demonstrated in a transmission experiment by Mohrdiek et al [33] via eye diagrams obtained with and without external optical injection. But these experiments give no indication on either the shape of the chirp or the sensitivity of this chirp to the variation of the injection conditions.…”

Section: Chirp Reductionmentioning

confidence: 99%

Experimental investigation of the impact of optical injection on vital parameters of a gain-switched pulse source

Guignard

Anandarajah

Clarke

et al. 2007

Optics Communications

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An analysis of optical injection on a gain-switched DFB laser and its impact on pulse parameters that influence the performance of the pulse source in high-speed optical communication systems is presented in this paper. A range of 10 GHz in detuning and 5 dB in injected power has been experimentally identified to attain pulses, from an the optically injected gain-switched DFB laser, with durations below 10 ps and pedestal suppression higher than 35 dB. These pulse features are associated with an SMSR of about 30 dB and a timing jitter of less than 1 ps. This demonstrates the feasibility of using optical injection in conjunction with appropriate pulse compression schemes for developing an optimized and cost-efficient pulse source, based on a gain-switched DFB laser, for high-speed photonic systems.

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Section: Chirp Reductionmentioning

confidence: 99%

Experimental investigation of the impact of optical injection on vital parameters of a gain-switched pulse source

Guignard

Anandarajah

Clarke

et al. 2007

Optics Communications

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show abstract

“…Under light injection, other interesting phenomena, such as locked or unstable regimes may be observed with different operating conditions. Locking occurs when the optical frequency of the injected light is chosen within the so-called locking range [17], [18]. This is the range over which the frequency of the slave laser can be tuned while still locked to the master laser frequency.…”

mentioning

confidence: 99%

Reduction of nonlinear distortion in directly modulated semiconductor lasers by coherent light injection

Yabre

Bihan²

1997

IEEE J. Quantum Electron.

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Abstract-A theoretical investigation of the second-and thirdorder intermodulation distortions (IMD's) in an injection-locked semiconductor laser under small-signal modulation is presented. The results show that a substantial reduction of the laser nonlinearity can be obtained, depending on both the injection level and frequency detuning between the master and slave lasers. The intensity modulation frequency response is also reported and shows that the injection-locked laser may also have a significantly improved behavior over the same free-running laser, revealed mostly in the reduced resonance peak and the broadening of the modulation bandwidth available.

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“…This has been successfully demonstrated in directly modulated links using distributed feedback lasers [14] and vertical-cavity surface-emitting lasers [16]. In addition, the frequency chirp and the relative intensity noise are also reduced in injectionlocked lasers [12,18].…”

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

confidence: 87%

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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Chirp reduction of directly modulated semiconductor lasers at 10 Gb/s by strong CW light injection

Cited by 102 publications

References 16 publications

Experimental investigation of the impact of optical injection on vital parameters of a gain-switched pulse source

Experimental investigation of the impact of optical injection on vital parameters of a gain-switched pulse source

Reduction of nonlinear distortion in directly modulated semiconductor lasers by coherent light injection

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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