Time- and Frequency-Domain Characterization of the Relative Intensity Noise of a Quantum-Dot Frequency Comb Source Laser

Cartledge, J.C.; O’Sullivan, Maurice

doi:10.1109/jstqe.2019.2926204

Cited by 7 publications

(4 citation statements)

References 45 publications

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“…The optical linewidth of each individual channel is between 920 kHz and 4.51 MHz, which is at the limit of being good enough for use as a laser source for tens Tbit/s and beyond coherent optical networking systems. The decrease in linewidth when going to longer wavelength is typical of the behaviour observed for all of our QD F-P lasers [36,37]. The possible reasons have been explained in reference paper [31].…”

Section: Performance Of Qd and Qw F-p Laserssupporting

confidence: 69%

InAs/InP Quantum Dash Semiconductor Coherent Comb Lasers and their Applications in Optical Networks

Lü

Liu

Poole

et al. 2021

J. Lightwave Technol.

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Section: Performance Of Qd and Qw F-p Laserssupporting

confidence: 69%

InAs/InP Quantum Dash Semiconductor Coherent Comb Lasers and their Applications in Optical Networks

Lü

Liu

Poole

et al. 2021

J. Lightwave Technol.

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“…The signalindependent noise consists of the background radiation noise received by the photodiode (PD) and the thermal noise from the electrical circuits at the receiver [20], [21]. The signal-dependent noise mainly has the relative intensity noise from the laser diode (LD) or light emitting diode (LED) [22], [23] at the transmitter and the shot noise from the PD [24], [25] at the receiver.…”

Section: A Definitionsmentioning

confidence: 99%

“…Regardless of the electrical current threshold, the output optical power of the LD or LED increases linearly with the input electrical current [22], [23]. Hence the optical power per bit to signal-dependent noise ratio is defined as:…”

Section: A Definitionsmentioning

confidence: 99%

Two Types of Mixed Orthogonal Frequency Division Multiplexing (X-OFDM) Waveform for Optical Wireless Communication

Li¹,

Huang²,

Lyu³

et al. 2020

Preprint

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The optical wireless communication (OWC) with the intensity modulation (IM), requires the modulated radio frequency (RF) signal to be real and non-negative. To satisfy the requirements, this paper proposes two types of mixed orthogonal frequency division multiplexing (X-OFDM) waveform. The Hermitian symmetry (HS) character of the sub-carriers in the frequency domain, guarantees the signal in the time domain to be real, which reduces the spectral efficiency to 1/2. For the odd subcarriers in the frequency domain, the signal in the time domain after the inverse fast fourier transform (IFFT) is antisymmetric. For the even sub-carriers in the frequency domain, the signal in the time domain after the IFFT is symmetric. Based on the antisymmetric and symmetric characters, the two types of X-OFDM waveform are designed to guarantee the signal in the time domain to be non-negative, where the direct current (DC) bias is not needed. With N sub-carriers in the frequency domain, the generated signal in the time domain has 3N/2 points, which further reduces the spectral efficiency to 1/3 = 1/2 × 2/3. The numerical simulations show that, the two types of X-OFDM waveform greatly enhance the power efficiency considering the OWC channel with the signal-dependent noise and/or the signalindependent noise.

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“…Integrated semiconductor mode locked laser diodes (SMLLDs) are compact and robust sources for generating coherent frequency combs. Optical frequency combs as a source of multiple spectral lines have been used in a variety of transmission system demonstrations, including long-reach systems with coherent detection, short-reach systems with direct detection, and passive optical networks [1]. Normally quantum dot or quantum dash SMLLDs have been used to produce coherent frequency combs, with the widest reported 3-dB bandwidth being as high as 16 nm [2].…”

mentioning

confidence: 99%

Frequency comb with 100 GHz spacing generated by an asymmetric MQW passively mode-locked laser

et al. 2020

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Time- and Frequency-Domain Characterization of the Relative Intensity Noise of a Quantum-Dot Frequency Comb Source Laser

Cited by 7 publications

References 45 publications

InAs/InP Quantum Dash Semiconductor Coherent Comb Lasers and their Applications in Optical Networks

InAs/InP Quantum Dash Semiconductor Coherent Comb Lasers and their Applications in Optical Networks

Two Types of Mixed Orthogonal Frequency Division Multiplexing (X-OFDM) Waveform for Optical Wireless Communication

Frequency comb with 100 GHz spacing generated by an asymmetric MQW passively mode-locked laser

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