Flattened optical frequency-locked multi-carrier generation by cascading one EML and one phase modulator driven by different RF clocks

Li, Xinying; Xiao, Jiangnan

doi:10.1016/j.yofte.2015.03.003

Cited by 15 publications

(8 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[12]. Periodic optical ultra-short pulse generation using mode-locked laser (MLL) [13][14], electro-optic modulators [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34], Kerr nonlinearity [35][36] and micro-resonators [37][38] are some effective techniques to generate OFC. MLL sources generate periodic pulse train of femto-second pulse width by controlling the cavity parameters [13][14].…”

Section: Introductionmentioning

confidence: 99%

Cross-phase modulation based ultra-flat 90-line optical frequency comb generation

2021

View full text Add to dashboard Cite

This paper proposed an approach to design an evenly spaced, 1.8 THz spectrally broad and 1.6 dB flat optical frequency comb (OFC) by exploiting the cross-phase modulation in highly nonlinear fiber. The OFC is realized by controlling the phase of the signals in two parallelly placed highly nonlinear fibers. The frequency and line spacing of the OFC can be tuned by simply varying the periodicity and central wavelength of input electrical and optical signal, respectively.

show abstract

Section: Introductionmentioning

confidence: 99%

Cross-phase modulation based ultra-flat 90-line optical frequency comb generation

2021

View full text Add to dashboard Cite

show abstract

“…For such applications, highly coherent optical multicarrier sources with stable flatness and uniform power distribution are desirable. Many endeavors have been made on the generation of optical multicarriers, conventional multicarrier sources are mainly based on highly nonlinear fibers, 4 microring resonators, 5,6 cascaded modulators, 7 and recirculating frequency shifter (RFS). 8 RFS has attracted wide attention in recent years because of its simple structure, low driving voltage, and flat subcarrier.…”

Section: Introductionmentioning

confidence: 99%

Time–frequency-varying multicarrier generation using dynamic recirculating frequency shifter

Liu

Zhang

et al. 2019

Opt. Eng.

View full text Add to dashboard Cite

A time-frequency-varying multicarrier generation scheme based on dynamic single-sideband recirculating frequency shifter is proposed and experimentally demonstrated. Through the use of two time-domain sinusoidal signals with stationary phase shift provided by a phase control module, multicarriers with flexible frequency intervals are obtained without carrier-to-noise ratio and flatness loss. We have experimentally attained multicarriers with 10-/12.5-/15-GHz carrier intervals in 3-nm bandwidth, and carriers with arbitrary intervals can be achieved when using the proposed scheme combined with a flexible wavelength selective switch.

show abstract

“…18 The method based on a mode locked laser does not offer free spectral range tunability and also suffers from cavity complexity. 19 Several methods have been reported for optical frequency locked multicarrier generation incorporating modulators in cascade [20][21][22][23][24][25] and using recirculating frequency shifting (RFS) loop [26][27][28][29][30][31][32][33][34][35] for frequency locked multicarrier generation. All the modulators used in cascade and RFS loops are driven by amplified RF clocks along with phase shifters and optical filters.…”

Section: Introductionmentioning

confidence: 99%

“…8,14, 15 The ASE noise is suppressed by using optical filters in RFS loop 33 and in cascade configurations. 38 With the same fashion, in cascade configurations, the OFC is generated using phase modulator with dual-drive MachZehnder modulator (DD-MZM) 20 with Mach-Zehnder modulator (MZM), [21][22] and phase modulator (PM) [23][24][25] only. DD-MZM based OFC is generated with hybrid interferometer modulator.…”

Section: Introductionmentioning

confidence: 99%

“…39 An OFC is generated with one electroabsorption modulated laser in cascade with a PM, which is driven by various amplified RF clocks with costly setup and limited number of comb lines. 40 Yet, the referred techniques have the major issues of extra costly components (high powered EA, phase shifter, and optical filter), more than one RF clock, a minimum number of comb lines, and greater amplitude excursions between comb lines.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Pulsed laser-based optical frequency comb generator for high capacity wavelength division multiplexed passive optical network supporting 1.2 Tbps

et al. 2016

View full text Add to dashboard Cite

, "Pulsed laser-based optical frequency comb generator for high capacity wavelength division multiplexed passive optical network supporting 1.2 Tbps," Opt. Eng. 55(9), 096106 (2016), doi: 10.1117/1.OE.55.9.096106. Abstract. An architecture for flattened and broad spectrum multicarriers is presented by generating 60 comb lines from pulsed laser driven by user-defined bit stream in cascade with three modulators. The proposed scheme is a cost-effective architecture for optical line terminal (OLT) in wavelength division multiplexed passive optical network (WDM-PON) system. The optical frequency comb generator consists of a pulsed laser in cascade with a phase modulator and two Mach-Zehnder modulators driven by an RF source incorporating no phase shifter, filter, or electrical amplifier. Optical frequency comb generation is deployed in the simulation environment at OLT in WDM-PON system supports 1.2-Tbps data rate. With 10-GHz frequency spacing, each frequency tone carries data signal of 20 Gbps-based differential quadrature phase shift keying (DQPSK) in downlink transmission. We adopt DQPSK-based modulation technique in the downlink transmission because it supports 2 bits per symbol, which increases the data rate in WDM-PON system. Furthermore, DQPSK format is tolerant to different types of dispersions and has a high spectral efficiency with less complex configurations. Part of the downlink power is utilized in the uplink transmission; the uplink transmission is based on intensity modulated on-off keying. Minimum power penalties have been observed with excellent eye diagrams and other transmission performances at specified bit error rates.

show abstract

Flattened optical frequency-locked multi-carrier generation by cascading one EML and one phase modulator driven by different RF clocks

Cited by 15 publications

References 23 publications

Cross-phase modulation based ultra-flat 90-line optical frequency comb generation

Cross-phase modulation based ultra-flat 90-line optical frequency comb generation

Time–frequency-varying multicarrier generation using dynamic recirculating frequency shifter

Pulsed laser-based optical frequency comb generator for high capacity wavelength division multiplexed passive optical network supporting 1.2 Tbps

Contact Info

Product

Resources

About