J. K. Sahu
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View article: Dependence of quantum efficiency and core propagation loss on doping concentration in Tm-doped silica fibers
Dependence of quantum efficiency and core propagation loss on doping concentration in Tm-doped silica fibers Open
A set of six thulium-doped aluminosilicate fibers with Tm 3+ -doping level ranging from 0.4 to 4.8 wt.% was fabricated, characterized, and investigated. By maintaining a similar aluminium content across fiber samples, it was possible to st…
View article: 0.82 um 105 W diode-pumped thulium-doped all silica fiber laser
0.82 um 105 W diode-pumped thulium-doped all silica fiber laser Open
An all-silica-fiber thulium-doped fiber laser emitting at 0.82 um on the transition from 3H4 to the ground state 3H6 outputs 105 W continuous-wave (CW) power and 555 W quasi-continuous-wave (QCW) instantaneous power with 0.96% duty cycle i…
View article: Progress in Er-doped fibers for extended L-band operation of amplifiers
Progress in Er-doped fibers for extended L-band operation of amplifiers Open
Erbium (Er)-doped fiber amplifiers (EDFAs) have revolutionized optical fiber communication, facilitating long-distance, large-capacity, and high-reliability data transmission. The explosive growth in transmission capacity, particularly in …
View article: A 0.82 μm, 105 W diode-pumped thulium-doped all-silica-fiber laser
A 0.82 μm, 105 W diode-pumped thulium-doped all-silica-fiber laser Open
An all-silica-fiber thulium-doped fiber laser emitting at 0.82 μm on the transition from 3 H 4 to the ground state 3 H 6 outputs 105 W continuous-wave power and 555 W quasi-continuous-wave instantaneous power with 0.96% duty cycle in 240 μ…
View article: All-fiber E + S band continuously tunable bismuth-doped germanosilicate fiber laser
All-fiber E + S band continuously tunable bismuth-doped germanosilicate fiber laser Open
In this Letter, we present an all-fiber bismuth (Bi)-doped germanosilicate fiber laser that is continuously tunable within the range of 1425–1475 nm, enabled by a tunable optical filter. A maximum output power of 86.4 mW was achieved at 14…
View article: Quasi-continuous-wave-pumped thulium-doped fiber laser with 0.2 kW of instantaneous output power
Quasi-continuous-wave-pumped thulium-doped fiber laser with 0.2 kW of instantaneous output power Open
A thulium-doped fiber laser operating quasi-continuous-wave generated 198 W of instantaneous output power in 0.2-ms pulses at 50 Hz repetition rate. The duty cycle becomes 1% and the average output power 2.0 W. This was cladding-pumped wit…
View article: High-gain ultra-wideband bismuth-doped fiber amplifier operating in the O + E + S band
High-gain ultra-wideband bismuth-doped fiber amplifier operating in the O + E + S band Open
We present a double-pass bismuth (Bi)-doped fiber amplifier (BDFA) providing high-gain wideband amplification from 1330 to 1480 nm. A peak gain of 38 dB with 4.7 dB noise figure (NF) was obtained at 1420 nm for a −23 dBm input signal, with…
View article: Coherent O-band WDM transmission of DP-16QAM over a 50-km BDFA-amplified link
Coherent O-band WDM transmission of DP-16QAM over a 50-km BDFA-amplified link Open
We present wavelength-division multiplexed coherent transmission in an O-band amplified link enabled by bismuth-doped fiber amplifiers (BDFAs). Transmission of 4 × 25 GBd DP-16QAM (4 × 200 Gb/s) is demonstrated over a single span of 50-km …
View article: Frequency drift characterization of a laser stabilized to an optical fiber delay line
Frequency drift characterization of a laser stabilized to an optical fiber delay line Open
Lasers stabilized to optical fiber delay lines have been shown to deliver a comparable short-term (<1 s) frequency noise performance to that achieved by lasers stabilized to ultra-low expansion (ULE) cavities, once the linear frequency dri…
View article: Radiation-resistant cerium co-doped erbium-doped fibers for C- and L-band amplifiers in a high-dose gamma-radiation environment
Radiation-resistant cerium co-doped erbium-doped fibers for C- and L-band amplifiers in a high-dose gamma-radiation environment Open
We experimentally demonstrate a comparative study on the radiation-resistant cerium (Ce) co-doped erbium-doped fiber amplifiers (EDFAs) exposed to a high-dose gamma-radiation environment of 1.8 kGy/h dose rate in the C and L bands. Our res…
View article: Mode attraction, rejection and control in nonlinear multimode optics
Mode attraction, rejection and control in nonlinear multimode optics Open
Novel fundamental notions helping in the interpretation of the complex dynamics of nonlinear systems are essential to our understanding and ability to exploit them. In this work we predict and demonstrate experimentally a fundamental prope…
View article: Bi-doped fiber amplifiers in the E + S band with a high gain per unit length
Bi-doped fiber amplifiers in the E + S band with a high gain per unit length Open
We present a bismuth (Bi)-doped fiber amplifier (BDFA) operating in the 1400–1480 nm range using 35 m of Bi-doped germanosilicate fiber. A maximum gain of 23 dB for an input signal of −23dBm at 1440 nm has been achieved, which, to the best…
View article: Flat-gain L-band amplifier containing AlPO<sub>4</sub> units in aluminophosphosilicate erbium-doped fibers
Flat-gain L-band amplifier containing AlPO<sub>4</sub> units in aluminophosphosilicate erbium-doped fibers Open
We present a flat-gain single-stage L-band erbium-doped fiber amplifier (EDFA) with a gain ripple of ±0.7 dB from 1580 to 1615 nm, by using aluminophosphosilicate erbium-doped fiber (APS-EDF) with an estimated AlPO 4 composition of 13.3 mo…
View article: Experimental investigation of BDFA-based O-band direct-detection transmission using an optical recirculating loop
Experimental investigation of BDFA-based O-band direct-detection transmission using an optical recirculating loop Open
We implemented a bismuth-doped fiber amplifier (BDFA) based optical recirculating loop to investigate the performance of amplified O-band transmission over appreciable distances. Both single-wavelength and wavelength-division multiplexed (…
View article: TECHNOLOGICAL INNOVATIONS IN RISK MANAGEMENT: ENHANCING RESILIENCE AND EFFICIENCY IN GLOBAL SUPPLY CHAINS
TECHNOLOGICAL INNOVATIONS IN RISK MANAGEMENT: ENHANCING RESILIENCE AND EFFICIENCY IN GLOBAL SUPPLY CHAINS Open
Global supply chains remain vulnerable to a multitude of risks due to geopolitical instability, economic unpredictability, and technological disruption. This paper explores how technological progress can enhance approaches to risk manageme…
View article: (INVITED) Bi-doped optical fibers and fiber amplifiers
(INVITED) Bi-doped optical fibers and fiber amplifiers Open
Bismuth (Bi)-doped aluminosilicate, phosphosilicate, germanosilicate and high (⩾50 mol%) germanosilicate fibers have shown luminescence around 1.15 μm, 1.3 μm, 1.45 μm and 1.7 μm, respectively. Bi-doped fibers have paved the way for develo…
View article: Tunable dissipative soliton Tm-doped fiber laser operating from 1700 nm to 1900 nm
Tunable dissipative soliton Tm-doped fiber laser operating from 1700 nm to 1900 nm Open
In this Letter, we demonstrate an ultrabroadband (1700–1900 nm) tunable Tm-doped fiber laser (TDFL) generating dissipative solitons in the net-normal dispersion regime. The laser delivers pulses with spectral widths ranging from 10 nm to 2…
View article: Standalone PV System Integrated with DC-DC Converter using Fuzzy Controlled MPPT
Standalone PV System Integrated with DC-DC Converter using Fuzzy Controlled MPPT Open
Renewable Energy has proved its dominance in the passage of time.Solar Energy is undoubtedly available in a huge manner in nature.A solar cell obviously has to function for maximum power and the technology is maximum power point tracking p…
View article: Experimental demonstration of single-span 100-km O-band 4×50-Gb/s CWDM direct-detection transmission
Experimental demonstration of single-span 100-km O-band 4×50-Gb/s CWDM direct-detection transmission Open
We report on what is to the best of our knowledge the longest 50-Gb/s/λ O-band wavelength-division multiplexed (WDM) transmission. A pair of in-house built bismuth-doped fiber amplifiers (BDFAs) and the use of Kramers-Kronig detection-assi…
View article: Observation of Light Self-Organization and Mode Attraction in a Multimode Optical Fiber
Observation of Light Self-Organization and Mode Attraction in a Multimode Optical Fiber Open
We present the first-ever quantitative analysis of mode attraction in a multimode fiber with a counter-propagative setup, as well as an overview of novel self-organization processes.
View article: Multicore fibers: a novel platform for a robust and reconfigurable self-organization of light
Multicore fibers: a novel platform for a robust and reconfigurable self-organization of light Open
We report on novel dynamics of light self-organization based on the interaction amongst forward and backward supermodes of a multicore (MC) fiber ( Fig. 1 ). As compared to recent studies in standard single-core fibers [1] , [2] , the MC p…
View article: Dataset for: High Gain Bi-Doped Fiber Amplifier Operating in the E-band with a 3-dB Bandwidth of 40nm
Dataset for: High Gain Bi-Doped Fiber Amplifier Operating in the E-band with a 3-dB Bandwidth of 40nm Open
This dataset supports the publication: Yu Wang, Naresh K Thipparapu, David J Richardson, Jayanta Sahu. (2021) High Gain Bi-Doped Fiber Amplifier Operating in the E-band with a 3-dB Bandwidth of 40nm. In: OFC 2021
View article: Numerical and experimental study on the impact of chromatic dispersionon O-band direct-detection transmission
Numerical and experimental study on the impact of chromatic dispersionon O-band direct-detection transmission Open
The recent emergence of efficient O-band amplification technologies has enabled the consideration of O-band transmission beyond short reach. Despite the O-band being a low chromatic dispersion (CD) window, the impact of CD will become incr…
View article: Experimental characterization of an o-band bismuth-doped fiber amplifier
Experimental characterization of an o-band bismuth-doped fiber amplifier Open
The recent emergence of bismuth-doped fiber amplifiers (BDFAs) offers the potential to transmit high-speed WDM signals over long distances in the O-band spectral region, thereby greatly enhancing the scope of systems utilizing these wavele…
View article: Experimental Demonstration of 50-Gb/s/Z O-band CWDM Direct-Detection Transmission over 100-km SMF
Experimental Demonstration of 50-Gb/s/Z O-band CWDM Direct-Detection Transmission over 100-km SMF Open
We demonstrate the first single-sideband 50-Gb/sA coarse WDM direct-detection transmission in the O-band. It is shown that the Kramers-Kronig-detection assisted single-sideband transmission exhibits significant OSNR sensitivity improvement…