Measurement of beat length in short low-birefringence fibers using the fiber optical loop mirror

Ibarra-Escamilla, B.; Kuzin, E.A.; Gutierrez-Zainos, Francisco; Tellez-Garcia, R.; Haus, Joseph W.; Rojas-Laguna, R.; Estudillo-Ayala, J. M.

doi:10.1016/s0030-4018(03)01117-9

Cited by 21 publications

(8 citation statements)

References 13 publications

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“…The FOLM is made of 500 m of low-birefringence, highly twisted Corning SMF-28 standard fiber, which was fusion-spliced with the output ports of a nearly symmetrical fused coupler (coupling ratio α = 0.51). The beat length of this fiber is 19 m. 17 At one end, the fiber is wrapped on a cylinder (with a properly chosen diameter) to form a QW retarder plate.…”

Section: Methodsmentioning

confidence: 99%

Stable nonlinear optical loop mirror switching using polarization rotation

et al. 2005

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We present experimental measurements and a corresponding theoretical analysis of a novel NOLM device made using a symmetrical (50/50) coupler, highly twisted fiber, and a quarter-wave (QW) retarder plate in the loop. The physical mechanism for the nonlinear properties is the polarization rotation of the counter-propagating optical fields. We also experimentally demonstrate that the nonlinear polarization rotation analysis is correct by controlling the transmission behavior as the QW retarder plate is rotated. We propose a simple description of the NOLM behavior, showing that nonlinear switching is obtained through the polarization asymmetry generated by the QW retarder plate. The proposed NOLM design is very attractive for applications like pedestal suppression and amplitude regularization of optical signals, since it operates stably without day-to-day drifting. We experimentally demonstrate the efficiency of the NOLM for high-order amplitude regularization of an optical pulse train subject to amplitude modulation, as an overall suppression of about 20 dB of the modulation was obtained over all frequencies. An environmentally stable NOLM will enable a wide range of applications, such as, optical switching and demultiplexing, all-optical active and passive mode-locking, and pedestal suppression.

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Section: Methodsmentioning

confidence: 99%

Stable nonlinear optical loop mirror switching using polarization rotation

et al. 2005

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“…Thus, based on the proposed hybrid grating structure, we demonstrate an optical fiber twist sensor. For a fiber under linear twist θ shown in Fig.1, without any change of other optical components, the Jones matrix of the twisted fiber can be given as [23]:…”

Section: Device Principle and Theoretical Analysismentioning

confidence: 99%

Low-cost temperature- and strain-insensitive twist sensor based on a hybrid fiber grating structure

et al. 2019

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We proposed and experimentally demonstrated a temperature-and strain-insensitive twist sensor based on a hybrid fiber grating structure, in which the hybrid grating structure is constructed with a 45°-tilted fiber grating (45°-TFG) and a chirped fiber Bragg grating (CFBG) UV-inscribed in a single mode fiber (SMF) in series. The sensing performance has been evaluated by experimental and numerical analyses which are in good consistency. The experimental results show the hybrid grating structure based twist sensor has a maximum twist sensitivity up to 15.037 dB/rad. Moreover, due to the invariability of the fiber birefringence and the state of polarization of the input light, such sensor has intrinsically low temperature and strain sensitivities of 7.86×10 −3 dB/°C and 6.7×10 −5 dB/με, corresponding to the maximum twist measurement error resulting from temperature and strain of 5.2×10 −4 rad/°C and 4.5×10 −6 rad/με, respectively.

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“…The transmission is a periodic function of the wavelength [13] with a period depending on the hi-bi fiber length and birefringence of the fiber. We choose the fiber length to have a half of period equal to 23 nm that allows the minimum transmission at about 1530 nm (peak of the ASE) and the maximum transmission at 1550 nm (signal wavelength).…”

Section: Amplifier Configurationmentioning

confidence: 99%

Two-stage single-pump Er-doped fiber amplifier with 55-dB amplification ns-long pulses

Bello-Jiménez

Kuzin

Ibarra-Escamilla

et al. 2007

Fiber Lasers IV: Technology, Systems, and Applications

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In this paper, we theoretically and experimentally investigated a two-stage erbium-doped fiber amplifier (EDFA) with a single-pump laser diode pumped at 980 nm in which a Sagnac interferometer filter is introduced to reduce amplified spontaneous emission (ASE) providing significant improvement on the amplifier performance. The erbium-doped fiber (EDF) parameters were measured in order to optimize parameters such as pump power, EDF length, ASE noise and signal gain. The Sagnac interferometer filter was designed to provide a periodic transmittance of 46 nm that allows by temperature to adjust the minimum transmission at 1530 nm (peak of the ASE noise) and maximum transmission at 1550 nm (signal wavelength). Experimental results show that with a simple configuration we obtained up to 53-dB amplification with only 75 mW of pump power, which can be enhanced easily by 3 dB providing total amplification up to more than 55 dB.

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Measurement of beat length in short low-birefringence fibers using the fiber optical loop mirror

Cited by 21 publications

References 13 publications

Stable nonlinear optical loop mirror switching using polarization rotation

Stable nonlinear optical loop mirror switching using polarization rotation

Low-cost temperature- and strain-insensitive twist sensor based on a hybrid fiber grating structure

Two-stage single-pump Er-doped fiber amplifier with 55-dB amplification ns-long pulses

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