Optical frequency conversion, pulse compression and signal copying using triangular pulses

Latkin, A.I.; Boscolo, Sonia; Bhamber, Ranjeet S.; Turitsyn, Sergei K.

doi:10.1109/ecoc.2008.4729140

Cited by 49 publications

(15 citation statements)

References 1 publication

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“…As can be seen from (5), a triangular waveform has only odd-order harmonics. To obtain an electrical signal with a spectrum containing the odd-order harmonics, the even-order harmonics need to be suppressed, which can be realized by biasing the equivalent MZM at the minimum transmission point (MITP) or equivalently to let ϕ = π, as shown in (4). Comparing the expression of I (t) in (4) with the Fourier series expansion of a typical triangular waveform sequence T tr (t) in (5), to generate an ideal triangular waveform, and assuming that θ = α = π/4, we should have where k = 3, 5, 7, .…”

Section: A Triangular Waveformmentioning

confidence: 99%

“…P HOTONICS generation of arbitrary microwave waveforms has been a topic of interest recently, which can find many important applications in modern radar systems [1], wired and wireless communications [2], [3], and all-optical microwave signal processing and manipulation [4], [5]. Various optical approaches have been reported to generate microwave waveforms.…”

Section: Introductionmentioning

confidence: 99%

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Photonic Generation of Microwave Waveforms Based on a Polarization Modulator in a Sagnac Loop

Liu

Yao

2014

J. Lightwave Technol.

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An optical microwave waveform generator using a polarization modulator (PolM) in a Sagnac loop is proposed and experimentally demonstrated. Microwave waveforms including a triangular waveform, a sawtooth waveform, and a square waveform, can be generated using a sinusoidal signal to modulate a light wave at a PolM in a Sagnac loop. In the proposed microwave waveform generator, a sinusoidal microwave signal is applied to the PolM in the Sagnac loop. Due to the velocity mismatch, only the clockwise light wave in the Sagnac loop is effectively modulated by the sinusoidal microwave signal at the PolM, and the counter-clockwise light wave is not modulated. Along the clockwise direction, the powers of the odd-and even-order sidebands can be controlled separately by tuning a polarization controller after the PolM. In addition, the output power of the optical carrier can be independently controlled by combining the counter-clockwise and clockwise optical carriers at the output of a polarization beam splitter. As a result, a modulated signal with controllable odd-and even-order sidebands is generated. By applying the modulated signal to a photodetector, a microwave signal with fully controllable odd-and even-order harmonics is generated, which corresponds to a desired microwave waveform. A theoretical analysis is developed, which is validated by an experiment. A triangular, sawtooth, and square waveform with a repetition rate tunable from 2 to 4 GHz is experimentally generated.

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Section: A Triangular Waveformmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photonic Generation of Microwave Waveforms Based on a Polarization Modulator in a Sagnac Loop

Liu

Yao

2014

J. Lightwave Technol.

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“…For example, it can be used for all-optical conversion of time-division multiplexed (TDM) to wavelength-division multiplexed (WDM) signals [1]. In addition, triangular pulses used for pulse compression, doubling of optical signals, and signal copying are also reported [2], [3].…”

Section: Introductionmentioning

confidence: 99%

Photonic Generation of Triangular Waveform Utilizing Time-Domain Synthesis

Jiang

Bai

et al. 2015

IEEE Photon. Technol. Lett.

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We propose and demonstrate a new photonic approach for triangular waveform generation. Based on an optical signal with sinusoidal envelope, an injection-locking process in a distributed-feedback semiconductor laser diode is employed to carry out the desired harmonic signal generation, and then the tailored signal is synthesized by the superimposition of these signals with proper power ratio and time delay. In this method, the conventional spectral line manipulating is transferred to individual signal envelope control, which reduces the technical requirement while the flexibility and accuracy is improved. In the experiment demonstration, triangular waveforms with the repetition frequencies of 9, 10, and 12 GHz are successfully generated. The results well agree with the theoretical predication and show great potential to realize arbitrary waveform generation.

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“…Photonic triangular pulse generation has attracted much attention due to its widespread applications in signal processing [1][2][3]. For example, the joint use of triangular pulses and the cross-phase-modulation effect can realize all-optical format conversion from time-division multiplexed signals to wavelength-division multiplexed signals [1].…”

mentioning

confidence: 99%

“…For example, the joint use of triangular pulses and the cross-phase-modulation effect can realize all-optical format conversion from time-division multiplexed signals to wavelength-division multiplexed signals [1]. It has also been reported that triangular pulses can be used, for example, for pulse compression, doubling of optical signals, and signal copying [2,3]. So far, much effort has been put into photonic generation of triangular pulses [4][5][6][7][8][9][10][11].…”

mentioning

confidence: 99%

Photonic generation of triangular pulses based on nonlinear polarization rotation in a highly nonlinear fiber

Wang

Wen

et al. 2014

Opt. Lett.

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We propose a novel method to generate triangular pulses based on the nonlinear polarization rotation (NPR) effect in a highly nonlinear fiber. A continuous wave probe beam is polarization-rotated by an intensity-modulated control beam via the NPR effect. A polarization-division-multiplexing emulator is exploited to split the probe beam into two orthogonally polarized states with imbalanced time delay. After detection by a photodetector, a 90° microwave phase shifter is used to compensate the phases of the fundamental and the third-order harmonic components in order to generate triangular pulses. Triangular pulses at 5 and 6 GHz with full duty cycles are experimentally generated. The root mean square errors between the generated and the simulated waveforms are 3.6e-4 and 1e-4 for triangular pulses at 5 and 6 GHz, respectively.

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Optical frequency conversion, pulse compression and signal copying using triangular pulses

Cited by 49 publications

References 1 publication

Photonic Generation of Microwave Waveforms Based on a Polarization Modulator in a Sagnac Loop

Photonic Generation of Microwave Waveforms Based on a Polarization Modulator in a Sagnac Loop

Photonic Generation of Triangular Waveform Utilizing Time-Domain Synthesis

Photonic generation of triangular pulses based on nonlinear polarization rotation in a highly nonlinear fiber

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