A Stable Dual-Wavelengths Fiber Laser Equipped by an In-Fiber Integrated Michelson Interferometer

2013 ◽  
Vol 421 ◽  
pp. 122-126
Author(s):  
Zhong Yao Feng ◽  
Ling Li ◽  
Dan Su ◽  
Yu Peng Wang
Keyword(s):  
Fiber Laser ◽  
Interference Pattern ◽  
Silver Film ◽  
Michelson Interferometer ◽  
Single Mode ◽  
Gain Medium ◽  
Single Mode Fiber ◽  
Fiber Core ◽  
The Core ◽  
Multi Mode

In this letter, an in-fiber integrated Michelson interformeteris proposed and experimentally demonstrated. The device consists in the combination of multi-mode fiber (MMF) and a single-mode fiber (SMF) tip which is covered by thick silver film. The MMF excites cladding modes into downstream SMF via the mismatch-core splicing interface. The core-cladding modes are reflected back by the silver and recoupled to fiber core through the MMF. By the reason of fiber-core mismatch and core-cladding modes interference, a well-defined interference pattern is obtained. A stable dual-wavelength fiber laser based on a hybrid gain medium combined with the interferometer filter is realized.

In-Fiber Michelson Interferometer Based on Thin-Core Fiber Combined with an End-Face Mirror

2013 ◽  
Vol 645 ◽  
pp. 202-207
Author(s):  
Wen Fu ◽  
Yao Hou ◽  
Liang Guo ◽  
Qiang Zhou Rong
Keyword(s):  
Ambient Temperature ◽  
Temperature Measurement ◽  
Temperature Variation ◽  
Interference Pattern ◽  
Temperature Sensitivity ◽  
Silver Film ◽  
Michelson Interferometer ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Core Fiber

An in-fiber Michelson interferometer (IFMI) is proposed and experimentally demonstrated. The configuration is formed by a thin-core fiber (TCF) following with a single mode fiber whose end tip is covered by a thick silver film as a mirror. The TCF excites cladding modes into downstream SMF via the mismatch-core splicing interface, and the low-order cladding modes can be reflected back to the fiber core via the mirror. A well-defined interference pattern is obtained due to the interference of between core and cladding modes. Experimental results represent that the device is linearly sensitive to the ambient temperature variation, and the selected interference dip of 1530nm represents a temperature sensitivity of 67.59pm/oC. The IFMI is compact and simple, and is a good candidate for ambient temperature measurement.

Fiber-optic Michelson interferometer based on α-Fe2O3/ZrO2 sensing membrane and its application in trace fluoride-ion detection

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Zizheng Yue ◽  
Wenlin Feng
Keyword(s):  
Silver Film ◽  
Fiber Optic ◽  
Michelson Interferometer ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Ion Concentration ◽  
Fluoride Ion ◽  
Ion Detection ◽  
Core Fiber ◽  
Sensing Membrane

Abstract In this work, a fiber-optic fluoride-ion-detection Michelson interferometer based on the thin-core fiber (TCF) and no-core fiber (NCF) coated with α-Fe2O3/ZrO2 sensing film is proposed and presented. The single-mode fiber (SMF) is spliced with the TCF and NCF in turn, and a waist-enlarged taper is spliced between them. Then, a silver film is plated on the end face of NCF to enhance the reflection. After the absorption of fluoride ion by the sensing film, the effective refractive index (RI) of the coated cladding will change, which leads to the regular red shift of the interference dip with the increasing fluoride-ion concentration. Thus, the fluoride-ion concentrations can be determined according to the corresponding dip wavelength shifts. The results show that the sensor has an excellent linear response (R 2 = 0.995) with good sensitivity (8.970 nm/ppm) when the fluoride-ion concentration is in the range of 0–1.5 ppm. The response time is about 15 s. The sensor has the advantage of good selectivity, good temperature and pH stabilities, and can be applied to detect fluoride ion effectively.

Lasing characteristics of 10 GHz signal spacing in a ring cavity multi-wavelength Brillouin fiber laser employing fiber Bragg grating

2016 ◽  
Vol 25 (04) ◽  
pp. 1650049 ◽  
Author(s):  
A. Zakiah Malek ◽  
N. A. M. Ahmad Hambali ◽  
M. H. A. Wahid ◽  
M. M. Shahimin
Keyword(s):  
Fiber Laser ◽  
Fiber Bragg Grating ◽  
Brillouin Scattering ◽  
Ring Cavity ◽  
Single Mode ◽  
Gain Medium ◽  
Single Mode Fiber ◽  
Bragg Grating ◽  
Output Coupling ◽  
Multi Wavelength

This paper experimentally demonstrated a ring cavity multi-wavelength Brillouin fiber laser employing fiber Bragg grating (FBG) that operated in the C-band region. The FBG plays a significant role to reflect signals and filter selected wavelengths. A number of generated Brillouin Stokes (BS) signals and tuning range ability were investigated. A 9[Formula: see text]km length of single mode fiber was utilized to provide a Brillouin gain medium for generating stimulated Brillouin scattering effect. In this work, at optimum output coupling ratio of 90% and Brillouin pump (BP) wavelength of 1550[Formula: see text]nm, up to a maximum of 26 BS signals were recorded by injecting 63.1[Formula: see text]mW of amplified BP powers. The BS signals were also tunable within the ranges of 1544–1556[Formula: see text]nm in accordance with the FBG properties at 3[Formula: see text]dBm bandwidth of 5[Formula: see text]nm.

Carbon monoxide gas sensor based on α-Fe2O3/rGOQDs composite film integrated Michelson interferometer

2021 ◽  
Author(s):  
Sijie He ◽  
Yushan Liu ◽  
Wenlin Feng ◽  
Bangxin Li ◽  
Xiao-Zhan Yang ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Composite Film ◽  
Silver Film ◽  
Simple Structure ◽  
High Selectivity ◽  
Michelson Interferometer ◽  
High Sensitivity ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Core Fiber

Abstract A carbon monoxide sensor based on Michelson interferometer combined with α-Fe2O3/rGOQDs composite film is proposed and fabricated. First, a waist-enlarged taper is formed between the single-mode fiber (SMF) and the no-core fiber (NCF), then the other end of the NCF is spliced with a section of thin-core fiber (TCF). Besides, the end of the TCF is coated with a layer of silver film to enhance the reflection. Thus, the Michelson interferometer of SMF-NCF-TCF is formed. The α-Fe2O3/rGOQDs composite film is deposited on the outside surface of TCF. The specific adsorption of carbon monoxide by the composite film leads to the change of the sensor’s effective refractive index (RI), realizing the detection of carbon monoxide. The results show that the interference intensity of the monitoring valley decreases with the increase of the concentration of carbon monoxide. The sensitivity of the sensor is 0.057 dBm/ppm, the detection limit of the sensor is 105 ppb, and the response time and recovery time are 70 s and 100 s, respectively. The sensor has the advantages of high sensitivity, high selectivity and simple structure, and it is expected to be applied for the detection of carbon monoxide gas with low concentration.

MULTIWAVELENGTH SOURCE USING A BRILLOUIN FIBER LASER

2008 ◽  
Vol 17 (02) ◽  
pp. 199-203 ◽  
Author(s):  
S. W. HARUN ◽  
M. R. SHIRAZI ◽  
H. A. ABDUL-RASHID ◽  
H. AHMAD
Keyword(s):  
Fiber Laser ◽  
Brillouin Scattering ◽  
Single Mode ◽  
Gain Medium ◽  
Single Mode Fiber ◽  
Feedback Mechanism ◽  
Brillouin Pump ◽  
Highly Nonlinear ◽  
Stokes Lines ◽  
Anti Stokes

A multiwavelength laser operating on the basis of stimulated Brillouin scattering (SBS) is demonstrated in a single mode fiber (SMF) coupled with a feedback loop and an optical circulator. Ten simultaneous Stokes and anti-Stokes lines are obtained with a line spacing of either 0.08 or 0.16 nm at a Brillouin pump (BP) power of 14 dBm. The use of a 50/50 fused coupler gives the highest number of lines at a Stokes power of approximately 8 dBm. The anti-Stokes lines are generated by four-wave mixing and bidirectional operation of the system. This Brillouin fiber laser (BFL) is capable of operating at any wavelength, depending completely on the BP wavelength. Due to the built-in feedback mechanism, its operation is free from the need for any additional active linear gain medium, such as erbium-doped fibers used in a Brillouin erbium fiber laser. Further, the SMF can in principle be replaced with a highly nonlinear waveguide, such as a photonic crystal waveguide, to make a compact multiwavelength BFL.

High power single-mode fiber laser and a multi-mode delivery cable

2012 ◽  
Author(s):  
Kosuke Kashiwagi ◽  
Takashi Kayahara ◽  
Yoshihiro Emori ◽  
Akira Fujisaki
Keyword(s):  
Fiber Laser ◽  
High Power ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Multi Mode

scholarly journals High-Sensitivity Refractive Index Sensor Based on a Cascaded Core-Offset and Macrobending Single-Mode Fiber Interferometer

2021 ◽  
Vol 7 ◽  
Author(s):  
Chuanxin Teng ◽  
Yongjie Zhu ◽  
Fangda Yu ◽  
Shijie Deng ◽  
Libo Yuan ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Sensitivity ◽  
Single Mode ◽  
Spectral Shift ◽  
Single Mode Fiber ◽  
Refractive Index Sensor ◽  
Core Mode ◽  
Fiber Core ◽  
The Core ◽  
Modal Interference

A high-sensitivity Mach–Zehnder interferometer (MZI) based on the cascaded core-offset and macrobending fiber structure is proposed for refractive index (RI) measurement. The core-offset structure makes the fiber core mode couple to the cladding modes, and some of them recouple back to the fiber core at the macrobending structure forming a model interference effect. The liquid RI can be measured by monitoring the spectral shift of the modal interference. The RI sensing performances for the interferometers with different macrobending radii and core offsets are investigated experimentally. Experimental results show that when the core offset is 2 μm and the macrobending radius is 5.5 mm, the sensitivity can reach 699.95 nm/RIU for the RI of 1.43. The temperature dependence for the proposed sensor is also tested, and a temperature sensitivity of 0.112 nm/°C is obtained.

Anti-dark solitons in a single mode fiber laser

2021 ◽  
Vol 395 ◽  
pp. 127226
Author(s):  
Jun Guo ◽  
Xiao Hu ◽  
Jie Ma ◽  
Luming Zhao ◽  
Deyuan Shen ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Dark Solitons

scholarly journals Peta-bit-per-second optical communications system using a standard cladding diameter 15-mode fiber

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Georg Rademacher ◽  
Benjamin J. Puttnam ◽  
Ruben S. Luís ◽  
Tobias A. Eriksson ◽  
Nicolas K. Fontaine ◽  
...  
Keyword(s):  
Wavelength Division Multiplexing ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Capacity Limits ◽  
Wavelength Division ◽  
Core Networks ◽  
Space Division Multiplexing ◽  
Space Division ◽  
Data Rates ◽  
Multi Mode

AbstractData rates in optical fiber networks have increased exponentially over the past decades and core-networks are expected to operate in the peta-bit-per-second regime by 2030. As current single-mode fiber-based transmission systems are reaching their capacity limits, space-division multiplexing has been investigated as a means to increase the per-fiber capacity. Of all space-division multiplexing fibers proposed to date, multi-mode fibers have the highest spatial channel density, as signals traveling in orthogonal fiber modes share the same fiber-core. By combining a high mode-count multi-mode fiber with wideband wavelength-division multiplexing, we report a peta-bit-per-second class transmission demonstration in multi-mode fibers. This was enabled by combining three key technologies: a wideband optical comb-based transmitter to generate highly spectral efficient 64-quadrature-amplitude modulated signals between 1528 nm and 1610 nm wavelength, a broadband mode-multiplexer, based on multi-plane light conversion, and a 15-mode multi-mode fiber with optimized transmission characteristics for wideband operation.

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