Optical Fiber Measurement

Hui, Rongqing; O’Sullivan, Maurice

doi:10.1016/b978-0-12-373865-3.00004-5

Cited by 84 publications

(72 citation statements)

References 47 publications

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“…The CW-ECL was previously tested between 1540 and 1590 nm to confirm that the polarization remains unchanged when sweeping the laser wavelength. It should be noted that the wavelength sweeping method can also be used to estimate the value of the linear birefringence of each core in different days, as detailed in [32,33]. Moreover, it should be remarked that the impact of the dispersive effects and the inter-core skew effect on the time dependence of the crosstalk [6,27] was minimized using a CW-ECL with a reduced linewidth of 50 kHz.…”

Section: Back-to-back Connectionmentioning

confidence: 99%

Birefringence effects in multi-core fiber: coupled local-mode theory

Macho¹,

García-Meca²,

Fraile-Peláez³

et al. 2016

Opt. Express

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Abstract:In this paper, we evaluate experimentally and model theoretically the intra-and inter-core crosstalk between the polarized core modes in single-mode multi-core fiber media including temporal and longitudinal birefringent effects. Specifically, extensive experimental results on a four-core fiber indicate that the temporal fluctuation of fiber birefringence modifies the intra-and inter-core crosstalk behavior in both linear and nonlinear optical power regimes. To gain theoretical insight into the experimental results, we introduce an accurate multi-core fiber model based on local modes and perturbation theory, which is derived from the Maxwell equations including both longitudinal and temporal birefringent effects. Numerical calculations based on the developed theory are found to be in good agreement with the experimental data.

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Section: Back-to-back Connectionmentioning

confidence: 99%

Birefringence effects in multi-core fiber: coupled local-mode theory

Macho¹,

García-Meca²,

Fraile-Peláez³

et al. 2016

Opt. Express

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“…The average spectrum is recorded as a function of fiber length using a cutback technique [58] starting from a 5.6 m GeO 2 fiber. A plot of the corresponding generated supercontinuum bandwidth (10 dB level) as a function of fiber length is shown in Fig.…”

Section: Tm-doped Mopfa and Supercontinuum Generationmentioning

confidence: 99%

Mid-infrared Raman-soliton continuum pumped by a nanotube-mode-locked sub-picosecond Tm-doped MOPFA

Zhang¹,

Kelleher²,

Runcorn³

et al. 2013

Opt. Express

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in : http://oatao.univ-toulouse.fr/ Eprints ID : 13602 Abstract:We demonstrate a mid-infrared Raman-soliton continuum extending from 1.9 to 3 µm in a highly germanium-doped silica-clad fiber, pumped by a nanotube mode-locked thulium-doped fiber system, delivering 12 kW sub-picosecond pulses at 1.95 µm. This simple and robust source of light covers a portion of the atmospheric transmission window. References and links

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“…In the proposed configuration [ figure 1(b)], the output 50/50 coupler is replaced with a 2x4 optical 90 • hybrid coupler followed by two balanced photodiodes. Together, these components allow the use of the phase diversity technique used extensively in coherent optical communications [37]. Although the same setup has been demonstrated before, it was only used with interferometer fields decorrelated by multikilometer delay-lines [20,21] and to stabilize the relatively unstable lasers used for data transmission applications [22].…”

Section: Simultaneous Fn and Rin Measurements Using The Phase Diversimentioning

confidence: 99%

Passive coherent discriminator using phase diversity for the simultaneous measurement of frequency noise and intensity noise of a continuous-wave laser

et al. 2016

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The frequency noise and intensity noise of a laser set the performance limits in many modern photonics applications and, consequently, must often be characterized. As lasers continue to improve, the measurement of these noises however becomes increasingly challenging. Current approaches for the characterization of very high-performance lasers often call for a second laser with equal or higher performance to the one that is to be measured, an incoherent interferometer having an extremely long delay-arm, or an interferometer that relies on an active device. These instrumental features can be impractical or problematic under certain experimental conditions. As an alternative, this paper presents an entirely passive coherent interferometer that employs an optical 90° hybrid coupler to perform in-phase and quadrature detection. We demonstrate the technique by measuring the frequency noise power spectral density of a highly-stable 192 THz (1560 nm) fiber laser over five frequency decades. Simultaneously, we are able to measure its relative intensity noise power spectral density and characterize the correlation between its amplitude noise and phase noise. We correct some common misconceptions through a detailed theoretical analysis and demonstrate the necessity to account for normal imperfections of the optical 90° hybrid coupler. We finally conclude that this passive coherent discriminator is suitable for reliable and simple noise characterization of highly-stable lasers, with bandwidth and dynamic range benefits but susceptibility to additive noise contamination.

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Optical Fiber Measurement

Cited by 84 publications

References 47 publications

Birefringence effects in multi-core fiber: coupled local-mode theory

Birefringence effects in multi-core fiber: coupled local-mode theory

Mid-infrared Raman-soliton continuum pumped by a nanotube-mode-locked sub-picosecond Tm-doped MOPFA

Passive coherent discriminator using phase diversity for the simultaneous measurement of frequency noise and intensity noise of a continuous-wave laser

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