A high power and repetition rate wavelength tunable actively mode-locked Holmium-doped fiber laser for bidirectional transmission between two HAPS

Mirza, Jawad; Atieh, Ahmad; AlQahtani, Salman; Ghafoor, Salman

doi:10.1007/s11082-023-05471-8

Cited by 4 publications

(7 citation statements)

References 23 publications

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“…Four short segments of singlemode polarization maintaining Ho-doped single clad active fibers having the same specifications as iXblue's Hodoped fiber (Model # iXblue IXF-HDF-PM-8-125) [15] are used as gain media in the ring cavity master oscillator, pre-amplifier, and power amplifiers, as shown in figure 2. Length of Ho-doped active fibers and doping concentrations of Holmium ions must be optimized to achieve best performance [3,16,17]. In this simulation study, we have considered already optimized values of Ho-doped active fiber length and doping concentration of Holmium ions from one of our previously published works [3].…”

Section: Proposed Architecturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Wavelength tunable high output power laser sources operating in the vicinity of 2000 nm eye-safe optical spectrum are of practical interest for multiple applications, such as remote sensing, optical wireless communication, medical applications, material processing, chemical sensing and so on [1][2][3]. The rare earth element Holmium has the ability to radiate light in this wavelength range [3]. One of the prevalent utilization of these high power laser sources operating in the 2000-2200 nm wavelength range is deep-space optical wireless communication, that exploits their reduced scattering and atmospheric absorption compared to traditional 1550 nm laser sources [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…The rare earth element Holmium has the ability to radiate light in this wavelength range [3]. One of the prevalent utilization of these high power laser sources operating in the 2000-2200 nm wavelength range is deep-space optical wireless communication, that exploits their reduced scattering and atmospheric absorption compared to traditional 1550 nm laser sources [3,4]. Therefore, power scaling of laser sources operating around 2000 nm has achieved a significant attention in the research field of lasers.…”

Section: Introductionmentioning

confidence: 99%

“…• The proposed MOPA system is flexible in terms of achieving tuning of 130 nm or 85 nm, depending upon inserting or eliminating the OBPFs between different stages. OptiSystem version 21 from Optiwave Inc. [3,10] is used in this work to design and analyze the overall performance of the Ho-doped MOPA system. The structure of the paper is as follows.…”

Section: Introductionmentioning

confidence: 99%

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Modeling and analysis of single-mode widely tunable all-fiber Ho-doped CW master oscillator power amplifier system

Mirza,

Salaria,

Ghafoor

et al. 2024

Phys. Scr.

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We report the design of an all-fiber single-mode polarization maintaining widely tunable Ho-doped master oscillator power amplifier (MOPA) system operating in the wavelength range of 2005-2135 nm based on a pre-amplifier and two power amplification stages. The single clad Ho-doped active fibers in the ring cavity based master oscillator, pre-amplifier, and power amplifiers are pumped using 1950 nm semiconductor laser diode pump sources. The amplification of the MOPA system is investigated over the entire spectral range of 2005-2135 nm. The highest output power achieved by the continuous wave (CW) Ho-doped MOPA system is 43 W at a wavelength of 2028.6 nm using pump power of 20 W with power conversion efficiency (PCE) of 90% for second power amplifier while the total pump power of Ho-doped MOPA system is 45 W. Optical bandpass filters (OBPFs) are employed between different stages of MOPA system to enable amplification over the wider spectral range of 2005-2135 nm by suppressing the amplified spontaneous emission (ASE). Not using OBPFs results in amplification that is limited to the spectral range of 2045-2130 nm. Therefore, a penalty of 45 nm can be avoided at the expense of using the OBPFs between different stages of MOPA system. This flexible MOPA system can be used in multiple applications, especially for space-borne high power transmitters operating in atmospheric transmission windows.

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Section: Proposed Architecturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Modeling and analysis of single-mode widely tunable all-fiber Ho-doped CW master oscillator power amplifier system

Mirza,

Salaria,

Ghafoor

et al. 2024

Phys. Scr.

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108 fs high-power mode locked double-clad ytterbium-doped fiber laser using FePS3 saturable absorber

Ahmad,

Lutfi,

Samion

et al. 2024

Opt Quant Electron

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Pair induced quenching in high concentration Holmium-doped fiber amplifiers

Mirza,

Ghafoor,

Almogren

et al. 2024

Phys. Scr.

Self Cite

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Holmium doped fiber amplifiers (HDFAs) have become a focus of researchers since they provide amplification in the very important spectral region around 2 μm wavelength. A major factor resulting in the performance degradation of HDFAs is the inhomogeneous energy transfer within Ho3+ ion-pairs in high-concentration Holmium doped fibers (HDFs), an effect generally known as pair-induced quenching (PIQ). In this paper, we study the luminal and temporal dynamics of pulses of different repetition rates at 2.05 μm in high-concentration HDFs considering the effects of ion-pairs. Input pulses having repetition rates of 25 GHz and 500 kHz are generated using wavelength tunable actively mode-locked Holmium-doped fiber laser (AML-HDFL) based on a single ring cavity and bidirectional pumping. The characteristics of the pulses propagating through high concentration HDF are analyzed based on different metrics such as average power, peak power, pulse energy, full width at half maximum, and time delay without and with ion-pairs for values of fraction of ion-pairs k = 0 and k = 10%, respectively. The results obtained at optimized length of HDF show that ion-pairs significantly degrade the average power, peak power, and energy of the output pulses for both of the repetition rates. For both k = 0 and k = 10%, the FWHM and shape of the output pulses remain same in the presence of the ion-pairs while, time delay of 4 ps and 19 ns is observed in the output pulses at repetition rates of 25 GHz and 500 kHz, respectively. The effects of increasing the pump and signal power on the average power and energy of the output pulses for k = 0 and k = 10% are also discussed for both repetition rates. This analysis provides important guidelines for designers of 2 μm fiber lasers and amplifiers based on high-concentration HDFs.

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A high power and repetition rate wavelength tunable actively mode-locked Holmium-doped fiber laser for bidirectional transmission between two HAPS

Cited by 4 publications

References 23 publications

Modeling and analysis of single-mode widely tunable all-fiber Ho-doped CW master oscillator power amplifier system

Modeling and analysis of single-mode widely tunable all-fiber Ho-doped CW master oscillator power amplifier system

108 fs high-power mode locked double-clad ytterbium-doped fiber laser using FePS3 saturable absorber

Pair induced quenching in high concentration Holmium-doped fiber amplifiers

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