Discrete mode laser diodes with very narrow linewidth emission

Kelly, Brian; Phelan, Richard; Jones, D. R.; Herbert, C.; O’Carroll, John; Rensing, Marc; Wendelboe, J.; Watts, Clare; Kaszubowska-Anandarajah, Aleksandra; Perry, Philip; Guignard, C.; Barry, Liam P.; O’Gorman, J.

doi:10.1049/el:20072311

Cited by 60 publications

(32 citation statements)

References 6 publications

(4 reference statements)

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“…An exception is the slotted laser reported in [6][7][8][9][10][11][12][13]. These lasers use optical defects in a standard Fabry-Pérot (FP) laser to specifically select a single mode, and such optical defects are formed by etching around 1 µm wide slots into the top ridge of the laser waveguide.…”

Section: Introductionmentioning

confidence: 99%

“…These slots, if we consider them as a kind of grating, are generally very high order surface gratings. Up to now there have been two types of laser schemes based on these slots: one is the mode selective FP laser type [6][7][8][9][10][11], where the slots are seated inside the laser cavity. This type of laser needs two cleaved facets to form the fundamental FP cavity and uses the slots to select one single mode from the multiple modes of the FP cavity.…”

Section: Introductionmentioning

confidence: 99%

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Integrable Slotted Single-Mode Lasers

Guo

Nawrocka

et al. 2012

IEEE Photon. Technol. Lett.

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Abstract:The re-growth free single mode lasers based on etched slots suitable for photonic integration are presented in this paper. The fabricated 650µm long laser exhibits a threshold current and a slope efficiency of about 32mA and 0.12mW/mA, respectively. The stable single mode operation has been observed with a side mode suppression ratio (SMSR) over 50dB at a current injection of 100mA for the fabricated laser. Such a laser integrated with electroabsorption (EA) modulator is also demonstrated. The integrated device has an extinction ratio over 10 dB at 2.2V driving voltage with the lasing wavelength of around 20nm positive detuning relative to the gain peak. The bandwidth measured is about 3GHz for the integrated device. 326-335 (1996). ©2011 Optical Society of America

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Integrable Slotted Single-Mode Lasers

Guo

Nawrocka

et al. 2012

IEEE Photon. Technol. Lett.

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“…This is because an ILL was used to transfer the frequency and the phase information of the carrier to the laser via injection locking and enhance the pilot power. The ILL was an AlInGaAs multiple quantum well discrete-mode laser diode with rigid geometry [13]. In Inset 3 of Fig.…”

Section: Experimental Setup For Injection Locked Laser Aided Sco-ofdmmentioning

confidence: 99%

Stabilization of self-coherent OFDM with injection locked laser

Adhikari

Sygletos

Ellis

et al. 2012

2012 14th International Conference on Transparent Optical Networks (ICTON)

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With the rebirth of coherent detection, various algorithms have come forth to alleviate phase noise, one of the main impairments for coherent receivers. These algorithms provide stable compensation, however they limit the DSP. With this key issue in mind, Fabry Perot filter based self coherent optical OFDM was analyzed which does not require phase noise compensation reducing the complexity in DSP at low OSNR. However, the performance of such a receiver is limited due to ASE noise at the carrier wavelength, especially since an optical amplifier is typically employed with the filter to ensure sufficient carrier power.Subsequently, the use of an injection-locked laser (ILL) to retrieve the frequency and phase information from the extracted carrier without the use of an amplifier was recently proposed. In ILL based system, an optical carrier is sent along with the OFDM signal in the transmitter. At the receiver, the carrier is extracted from the OFDM signal using a Fabry-Perot tunable filter and an ILL is used to significantly amplify the carrier and reduce intensity and phase noise. In contrast to CO-OFDM, such a system supports low-cost broad linewidth lasers and benefits with lower complexity in the DSP as no carrier frequency estimation and correction along with phase noise compensation is required.

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“…The past experiments in the NIR with External Cavity (EC) diode laser with a grating as frequency selected feedback suggest that their ILW is much narrower, and ~ 500KHz was demonstrated [10] by high precision spectroscopy or high Q cavities, and in telecom more often by Delayed Self-Homodyne RF analysis [11].…”

Section: Near-ir Dfb and External Cavity Diode Lasersmentioning

confidence: 99%

Microsensors based on quantum cascade lasers

Deev

Tang

2011

SPIE Proceedings

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We present our results on efficient coupling of Quantum Cascade Lasers (QCLs) into Whispering Gallery Resonators, Hollow Waveguide. We also present results of micro sensors using the unique properties of QCLs, e.g. online sensors for Gas Chromatography (GC). We show that because of the unique brightness properties of QCLs, we could improve GC-Infrared sensors' sensitivity to the same level as Mass Spectrometry, and with different dimension of chemical information.

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Discrete mode laser diodes with very narrow linewidth emission

Cited by 60 publications

References 6 publications

Integrable Slotted Single-Mode Lasers

Integrable Slotted Single-Mode Lasers

Stabilization of self-coherent OFDM with injection locked laser

Microsensors based on quantum cascade lasers

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