Generation of frequency symmetric signals from a BPSK input for Phase Sensitive Amplification

Weerasuriya, Ruwan; Sygletos, Stylianos; Ibrahim, Selwan K.; Phelan, Richard; O’Carroll, John; Kelly, Brian; O’Gorman, J.; Ellis, A.D.

doi:10.1364/ofc.2010.owt6

Cited by 36 publications

(29 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, special care has to be taken to make sure that the dual-modes are injected with OSNR higher than a threshold to have complete injectionlocking. Correct evaluation of this threshold requires a separate study to investigate the robustness of dual-mode injection scheme against OSNR similar to what has been done in [27] for injection locking to CW slave lasers. In addition to the noise, residual phase modulation is present in the generated carriers.…”

Section: A Experimental Arrangement and Resultsmentioning

confidence: 99%

“…Although their phase squeezing capabilities have been well known for more than a decade [25], a practical implementation that would allow them to stand as independent, black box elements in transmission links was missing until recently [26]. This was achieved using the synchronization scheme proposed in [27], which combined carrier extraction and frequency generation functionalities along with optical injection-locking of a local oscillator laser to create the synchronized pumps of the PSA. Recently, this scheme was extended to demonstrate the first two-channel DPSK PSA using optical injection-locking of two independent single-mode lasers [28].…”

Section: Phase-synchronization Of a Two-channel Phase Sensitive Ammentioning

confidence: 99%

See 1 more Smart Citation

Optical Frequency Comb Generation Using Dual-Mode Injection-Locking of Quantum-Dash Mode-Locked Lasers: Properties and Applications

Sooudi

Sygletos

Ellis

et al. 2012

IEEE J. Quantum Electron.

Self Cite

View full text Add to dashboard Cite

Abstract-In this paper, we describe generation and application of wide, narrow linewidth optical frequency combs using dualmode injection-locking of InP quantum-dash mode-locked lasers. In the first part, the dependence of the RF locking-range on the device's absorber voltage is experimentally investigated. Under optimized absorber voltage, a continuous, wide RF locking-range of ≈400 MHz is achievable for lasers with 21 GHz repetition rate. The total RF locking-range of ≈440 MHz is possible considering of locking-range for positive and negative absorber voltages. This wide tuning >2% of the repetition rate, a record for a monolithic mode-locked laser, is reported from a two-section device without any additional passive section or extended-cavity for repetition rate tuning. It is shown that the effective RF locking-range in dual-mode injection corresponds to the optical locking-range and repetition rate tuning under CW injection which is wider when the free-running mode-locking operation is "less stable". The widest comb consists of 35 narrow lines within 10 dB of the peak, spanning ≈ 0.7 THz, generating 3.7 ps pulses. In the second part, we show the first demonstration of multi pump phase-synchronization of two 10 Gb/s DPSK channels in a phasesensitive amplifier using dual-mode injection-locking technique. The phase-sensitive amplifier based on "black box" scheme shows more than 7 dB phase-sensitive gain and error free performance for both input channels with 1 dB penalty.Index Terms-Mode-locked lasers, optical-injection-locking, optical frequency combs, quantum-dash lasers, and phasesensitive amplifiers.

show abstract

Section: A Experimental Arrangement and Resultsmentioning

confidence: 99%

Section: Phase-synchronization Of a Two-channel Phase Sensitive Ammentioning

confidence: 99%

Optical Frequency Comb Generation Using Dual-Mode Injection-Locking of Quantum-Dash Mode-Locked Lasers: Properties and Applications

Sooudi

Sygletos

Ellis

et al. 2012

IEEE J. Quantum Electron.

Self Cite

View full text Add to dashboard Cite

show abstract

“…At the DPSK regenerator input, the pilot carriers with powers of ~ -17 dBm were used to phase and frequency synchronize two discrete-mode laser [6] based CW pumps by injection locking. This process locally regenerates the seeds by removing their amplitude noise and by amplifying them.…”

Section: Methodsmentioning

confidence: 99%

“…Regeneration based on dual pump degenerate fiber optic parametric amplifier (FOPA) has also been proved both theoretically [4] and experimentally [5]. Using the phase locking scheme proposed in [6] to generate a pair of synchronized and frequency symmetric pump signals, the first practical "black-box" regenerator has been demonstrated in [7]. The regenerative properties of those schemes have been assessed by applying a periodic (single tone) degradation to their inputs.…”

Section: Introductionmentioning

confidence: 99%

DPSK Signal Regeneration With a Dual-Pump Nondegenerate Phase-Sensitive Amplifier

Frascella

Sygletos

Gunning

et al. 2011

IEEE Photon. Technol. Lett.

Self Cite

View full text Add to dashboard Cite

Abstract-We demonstrate, for the first time to our knowledge, regeneration of a 42.66 Gbit/s differential phase shift keyed signal using a dual-pump non-degenerate four wave mixing-based fiber optic parametric amplifier. The regenerative performance of the subsystem is characterized in terms of biterror-rate against narrow-band and wide-band introduced noise. Whilst a strong receiver sensitivity improvement, up to 20 dB, is noticed against narrow-band noise, against quasi-random (wideband) noise we observe a regeneration of 2.7 dB.Index Terms-differential phase shift keying (DPSK), optical parametric amplification, phase-sensitive amplification (PSA)I. INTRODUCTION LL-OPTICAL regenerators are expected to extend the transparent length of high-speed transmission systems and simultaneously lower the energy consumption, compared to their opto-electro-optical counterparts [1]. The emergence of differential phase shift keying (DPSK) as a widely adopted modulation format for long haul transmission has prompted great interest in regeneration schemes for phase encoded signal formats. Such regenerators should provide suppression of the accumulated noise in both the amplitude and the phase of the propagated signal.Phase sensitive amplification (PSA) has proved its potential for phase noise suppression on DPSK signals. Initial schemes were based on single pump degenerate four wave mixing (FWM) in a fiber [2], [3]. Regeneration based on dual pump degenerate fiber optic parametric amplifier (FOPA) has also been proved both theoretically [4] and experimentally [5]. Using the phase locking scheme proposed in [6] to generate a pair of synchronized and frequency symmetric pump signals, the first practical "black-box" regenerator has been demonstrated in [7]. The regenerative properties of those

show abstract

“…Although post-detection carrier phase estimation in the digital domain using a free-running local oscillator (LO) is widely favored in current coherent transmission systems [2], the original approach to homodyne detection using a carrier-phase synchronized LO still has advantages such as potentials of lower-power consumption and compact receiver structures. The optical carrier extraction is also needed in coherent signal processing such as phase-sensitive amplification [3]. Because carrier is suppressed in most of practical modulation formats used in coherent systems such as binary or quaternary phase shift keying (BPSK or QPSK) and quadrature amplitude modulation (QAM), extraction of carrier from such carrier-less signals is particularly important.…”

Section: Introductionmentioning

confidence: 99%

Optical carrier extraction from carrier-less phase modulated optical signals

Matsumoto

Nishimura

2015

IEICE Electron. Express

View full text Add to dashboard Cite

We propose a novel and simple carrier recovery method from carrier-less phase modulated optical signals. In this method, homodyne detection of the received signal, modulation stripping by an electro-optic phase modulator, and injection locking of a laser diode for carrier generation are performed in a feedback loop. Carrier extraction and error-free homodyne detection of a 10-Gb/s RZ-BPSK signal is demonstrated. The method can also be extended to carrier extraction from QPSK signals.

show abstract

Generation of frequency symmetric signals from a BPSK input for Phase Sensitive Amplification

Cited by 36 publications

References 2 publications

Optical Frequency Comb Generation Using Dual-Mode Injection-Locking of Quantum-Dash Mode-Locked Lasers: Properties and Applications

Optical Frequency Comb Generation Using Dual-Mode Injection-Locking of Quantum-Dash Mode-Locked Lasers: Properties and Applications

DPSK Signal Regeneration With a Dual-Pump Nondegenerate Phase-Sensitive Amplifier

Optical carrier extraction from carrier-less phase modulated optical signals

Contact Info

Product

Resources

About