scholarly journals Hybrid Raman-erbium random fiber laser with a half open cavity assisted by artificially controlled backscattering fiber reflectors

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
R. A. Perez-Herrera ◽  
P. Roldan-Varona ◽  
M. Galarza ◽  
S. Sañudo-Lasagabaster ◽  
L. Rodriguez-Cobo ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Laser Emission ◽  
Signal To Noise Ratio ◽  
Strain Sensor ◽  
Laser Cavity ◽  
Optical Signal ◽  
Open Cavity ◽  
Signal To Noise ◽  
Erbium Doped ◽  
Power Instability

AbstractA hybrid Raman-erbium random fiber laser with a half-open cavity assisted by chirped artificially controlled backscattering fiber reflectors is presented. A combination of a 2.4 km-long dispersion compensating fiber with two highly erbium-doped fiber pieces of 5 m length were used as gain media. A single random laser emission line centered at 1553.8 nm with an optical signal to noise ratio of 47 dB were obtained when pumped at 37.5 dBm. A full width at half maximum of 1 nm and a 100% confidence level output power instability as low as 0.08 dB were measured. The utilization of the new laser cavity as a temperature and strain sensor is also experimentally studied.

scholarly journals Hybrid Raman-Erbium Random Fiber Laser with a Half Open Cavity Assisted by Artificially Controlled Backscattering Fiber Reflectors

2021 ◽  
Author(s):  
R. A. Perez-Herrera ◽  
P. Roldan-Varona ◽  
M. Galarza ◽  
S. Sañudo-Lasagabaster ◽  
L. Rodriguez-Cobo ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Output Power ◽  
Signal To Noise Ratio ◽  
Power Level ◽  
Laser Cavity ◽  
Gain Medium ◽  
Optical Signal ◽  
Open Cavity ◽  
Output Power Level ◽  
Erbium Doped

Abstract A hybrid Raman-erbium random fiber laser (RFL) with a half-open cavity assisted by chirped artificially controlled backscattering fiber reflectors (ACBFRs) is presented. A combination of 2.4 km of dispersion compensating fiber (DCF) with two highly erbium-doped fiber (EDF) pieces of 5 m length was used as gain medium. A single random laser emission line centered at 1553.8 nm with an output power level of -6.5 dBm and an optical signal to noise ratio (OSNR) of 47 dB was obtained when pumped at 37.5 dBm. A full width at half maximum (FHWM) of 1 nm and a 100% confidence level (CL) output power instability as low as 0.08 dB were measured. The utilization of the new laser cavity as a temperature and strain sensor is also experimentally studied.

scholarly journals Graphene slurry based passive Q-switcher in erbium doped fiber laser

2019 ◽  
Vol 8 (4) ◽  
Author(s):  
Siti Nur Fatin Zuikafly ◽  
Nor Farhah Razak ◽  
Rizuan Mohd Rosnan ◽  
Sulaiman Wadi Harun ◽  
Fauzan Ahmad
Keyword(s):  
Pump Power ◽  
Fiber Laser ◽  
Pulse Width ◽  
Peak Power ◽  
Signal To Noise Ratio ◽  
Pulsed Laser ◽  
Laser Cavity ◽  
Signal To Noise ◽  
Maximum Pulse Energy ◽  
Erbium Doped

In this work, a Graphene slurry based passive Q-switcher fabricated from Graphene-Polylactic acid (PLA) filament which is used for 3D printing. To produce the Graphene slurry, the diameter of the filament was reduced and Tetrahydrofuran (THF) was used to dissolve the PLA. The Graphene-THF suspension was drop cast to the end of a fiber ferrule and the THF then evaporated to develop Graphene slurry based SA which is integrated in fiber laser cavity. At threshold input pump power of 30.45 mW, a Q-switched Erbium-doped fiber laser (EDFL) can be observed with the wavelength centered at 1531.01 nm and this remained stable up to a pump power of 179.5 mW. As the pump power was increased gradually, an increase in the repetition rates was recorded from 42 kHz to 125 kHz, while the pulse width was reduced to 2.58 μs from 6.74 μs. The Q-switched laser yielded a maximum pulse energy and peak power of 11.68 nJ and 4.16 mW, respectively. The proposed Graphene slurry based saturable absorber also produced a signal-to-noise ratio of 44 dB indicating a stable Q-switched pulsed laser.

Cu2Te-PVA as Saturable Absorber for Generating Q-switched Erbium-doped Fiber Laser

2021 ◽  
Author(s):  
Harith b Ahmad ◽  
Nur Fatini Azmy ◽  
Siti Aisyah Reduan ◽  
Norazriena Yusoff ◽  
Zamzuri Abdul Kadir
Keyword(s):  
Fiber Laser ◽  
Saturable Absorber ◽  
Pulse Width ◽  
Tuning Range ◽  
Bandpass Filter ◽  
Signal To Noise Ratio ◽  
Laser Cavity ◽  
Continuous Operation ◽  
Signal To Noise ◽  
Erbium Doped

Abstract A passively Q-switched erbium-doped fiber laser (EDFL) using copper telluride-polyvinyl alcohol (Cu2Te-PVA) thin film as saturable absorber (SA) was proposed and demonstrated. The generated Q-switched pulses could be tuned over a tuning range of 44 nm from 1530 nm to 1574 nm, with the addition of a tunable bandpass filter (TBPF) into the C-band laser cavity. The pump power of 130.1 mW to 221.0 mW was used to observe the output pulses, which had repetition rates from 51.3 kHz to 61.7 kHz, with a minimum pulse width of around 1.84 µs and highest pulse energy of 7 nJ. The generated pulses were stable with a constant signal to noise ratio (SNR) value of around 51 dB when tested under continuous operation over a period of 60 minutes. To the best of our knowledge, this is the first demonstration of Q-switched pulses induced by a Cu2Te-PVA based SA in an EDFL.

scholarly journals Tunable Linear Fiber Laser Cavity Based on a Twisted Mechanical Long Period Grating

2018 ◽  
Vol 64 (6) ◽  
pp. 615
Author(s):  
Julian Moises Estudillo-Ayala
Keyword(s):  
Fiber Laser ◽  
Laser Emission ◽  
Signal To Noise Ratio ◽  
Laser Cavity ◽  
Single Mode ◽  
Optical Signal ◽  
Long Period Grating ◽  
Dual Emission ◽  
Linear Cavity ◽  
Long Period

The present manuscript shows linear cavity fiber laser experimental analysis. The fiber laser arrangement, use an all fiber mechanical long period grating (MLPG) to control single and dual laser emission.  Here, single laser emission centered at 1562nm with a signal to noise ratio of 27dB and a linewidth less than 0.1nm is obtained and tuned from 1562nm to 1546nm, by twisted a conventional section of single mode fiber that was set into the MLPG. Thus, when the twist is around 120º dual emission is obtained with centered wavelengths at 1533nm and 1546nm, these emissions can be switched between them when the twist is incremented and the peak centered at 1546nm is tuned in backward direction. The proposed laser offers wavelength and power stability with minimal variations of   0.5dB and 0.5nm respectively.  This laser can be applied in several fields such as sensing, optical signal analysis and optical communications. 

scholarly journals HIGH SIGNAL-TO-NOISE RATIO Q-SWITCHING ERBIUM DOPED FIBER LASER PULSE EMISSION UTILIZING SINGLE LAYER TRIVIAL TRANSFER GRAPHENE FILM SATURABLE ABSORBER

2016 ◽  
Vol 78 (3) ◽  
Author(s):  
K. Y. Lau ◽  
A. A. Latif ◽  
M. H. Abu Bakar ◽  
M. A. Mahdi
Keyword(s):  
Laser Pulse ◽  
Fiber Laser ◽  
Saturable Absorber ◽  
Signal To Noise Ratio ◽  
Single Layer ◽  
High Signal ◽  
Signal To Noise ◽  
Pulse Emission ◽  
Erbium Doped ◽  
Noise Ratio

This paper presents the high signal-to-noise ratio (SNR) Q-switched erbium-doped fiber laser pulse emission using a commercial single layer graphene (SLG) film as a saturable absorber (SA). A sandwiched-type structure with transferred single layer SLG film between two fiber ferrules is formed to function as the SA. Q-switched pulse emission with repetition rate from 47.25 kHz to 67.39 kHz and round-trip time per oscillation from 7.42 µs to 10.36 µs are obtained from the laser cavity set-up. The SNR of 62.64 dB shows a good quality of pulse generation using the SLG film as SA. The effortless production of SLG is enabling factor to produce fast fabrication and low cost SA for application in Q-switched pulsed fiber lasers.  

scholarly journals Observation of dark and bright pulses in q-switched erbium doped fiber laser using graphene nano-platelets as saturable absorber

2019 ◽  
Vol 8 (4) ◽  
Author(s):  
Nur Hidayah Muhamad Apandi ◽  
Siti Nur Fatin Zuikafly ◽  
Nabilah Kasim ◽  
Mohd Ambri Mohamed ◽  
Sulaiman Wadi Harun ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Fiber Laser ◽  
Saturable Absorber ◽  
Signal To Noise Ratio ◽  
Ring Cavity ◽  
Laser Cavity ◽  
Laser Generation ◽  
Output Peak Power ◽  
Erbium Doped ◽  
Cavity Configuration

In this paper, a passively Q-switched Erbium doped fiber laser (EDFL) by residing Graphene nanoplatelets (GnPs) embedded in polyvinyl alcohol (PVA) based saturable absorber (SA) is demonstrated. To aid the dispersion of GNPs, a surfactant is used and then it is mixed with polyvinyl alcohol (PVA) as host polymer to develop GnPs-PVA film based passive SA. The GnPs-PVA based film then integrated in laser cavity in ring cavity configuration for pulse laser generation. The experimental works show that the proposed passive SA operates at input pump power range from 77 mW to 128 mW with a tunable repetition rate from 78.4 kHz to 114.8 kHz and a shortest pulse width of 3.69 µs. The laser produces maximum instantaneous output peak power and pulse energy of 7.3 mW and 30.46 nJ, respectively and accompanied by signal to noise ratio (SNR) of 64 dB.

Use of symmetric Sagnac dual-ring scheme for tunable single-mode erbium fiber laser

2022 ◽  
Author(s):  
Yi-Chi Chen ◽  
Chien-Hung Yeh ◽  
Wen-Piao Lin ◽  
Li-Hung Liu ◽  
Han-Shin Ko ◽  
...  
Keyword(s):  
Continuous Wave ◽  
Signal To Noise Ratio ◽  
Longitudinal Mode ◽  
Single Mode ◽  
Gain Medium ◽  
Optical Signal ◽  
Wavelength Tuning ◽  
Signal To Noise ◽  
Erbium Doped ◽  
Dual Ring

Abstract In this paper, an erbium-doped fiber (EDF) laser with symmetric Sagnac dual-ring scheme is experimentally studied to achieve tunable and stable continuous-wave (CW) single-longitudinal-mode (SLM) presentation. In the measurement, the obtained wavelength-tuning bandwidth can be reached from 1518.0 to 1578.0 nm based on a C-band EDF gain-medium. Moreover, the corresponding output power, optical signal to noise ratio (OSNR) and wavelength linewidth of the designed EDF laser are studied and performed simultaneously.

Q-switched erbium-doped fiber laser with molybdenum disulfide (MoS2) nanoparticles on D-shaped fiber as saturable absorber

2019 ◽  
Vol 28 (03) ◽  
pp. 1950026 ◽  
Author(s):  
H. Ahmad ◽  
S. Soltani ◽  
K. Thambiratnam
Keyword(s):  
Molybdenum Disulfide ◽  
Pulse Width ◽  
Signal To Noise Ratio ◽  
Laser Cavity ◽  
Laser Pulses ◽  
High Signal ◽  
Signal To Noise ◽  
Saturable Absorbers ◽  
Erbium Doped ◽  
Compact Design

In this study, short [Formula: see text]-switching laser pulses are generated by drop-casting two-dimensional Molybdenum Disulfide (MoS[Formula: see text] nanoparticles as saturable absorbers (SA) on a side polished optical fiber in a [Formula: see text]-band laser cavity. The proposed laser is capable of generating highly stable [Formula: see text]-switched laser pulses at the wavelength of 1559.42[Formula: see text]nm with a maximum repetition rate of 73.96[Formula: see text]kHz, and a minimum pulse width of 1.93[Formula: see text][Formula: see text]s. The relatively high signal-to-noise ratio of 58.7[Formula: see text]dB indicates a highly stable output. The proposed SA can be applied in a variety of fields due to its ease of manufacturing and cost-effectiveness as well as its robust and compact design.

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