Switchable multiwavelength ytterbium-doped fiber laser using a non-adiabatic microfiber interferometer

Zulkhairi, A.S.; Azzuhri, Saaidal Razalli; Shaharuddin, R.A.; Jaddoa, M.F.; Salim, M. A. M.; Jasim, Ali Abdulhadi; Ahmad, Harith

doi:10.1088/1555-6611/aa6587

Cited by 18 publications

(11 citation statements)

References 24 publications

(28 reference statements)

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“…We can understand this character as follows: In a single-mode tapered fiber, when the fundamental mode propagated from the untapered region to the tapered region, higher-order modes would be excited in the tapered region, then the fundamental modes and higher order modes would be coupled together in the untapered region, and interference effect was formed. So the tapered fiber can be used as a filter to generate stable multiple wavelengths [40]- [42]. Further study showed that the free spectral range (FSR) can be expressed as [43], [44]:…”

Section: Discussionmentioning

confidence: 99%

Tunable Multi-Wavelength Bright-Dark and Dark-Bright Pulse Pairs Fiber Lasers

et al. 2020

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We have experimentally demonstrated tunable multi-wavelength bright-dark and dark-bright pulse pairs in an all normal dispersion Yb-doped fiber laser (YDFL) with a long cavity configuration. By carefully adjusting the pump power and the polarization state, bright-dark pulse pairs could be converted into dark-bright pulse pairs at the same wavelength. The comb filter provided by the tapered fiber facilitated the formation of the multi-wavelength pulses. And the wavelength-tunable for both bright-dark pulse pairs and dark-bright pulse pairs could be achieved by using a tapered fiber and rotatable polarization controller in the cavity to control the cavity losses. The tunable ranges were 14 nm and 4 nm with wavelength spacings of~3.5 nm and~3.7 nm for dual-wavelength pulse pairs and triple-wavelength pulse pairs, respectively.

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Section: Discussionmentioning

confidence: 99%

Tunable Multi-Wavelength Bright-Dark and Dark-Bright Pulse Pairs Fiber Lasers

et al. 2020

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“…All-fiber polarization interference filter based uniform multiwavelength erbium-doped fiber laser interferometer [30,31], chirped or sampled fiber grating [32] and a microfiber interferometer [33]. In recent years, the Lyot filter has attracted considerable interest for generating multiwavlength fiber lasers due to its all fiber structure and convenience in choosing wavelength spacing [20,21,34,35].…”

Section: Laser Physicsmentioning

confidence: 99%

All-fiber polarization interference filter based uniform multiwavelength erbium-doped fiber laser

et al. 2019

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We demonstrate a compact and stable room-temperature multiwavelength erbium doped fiber laser by employing 45° tilted fiber gratings based on an all-fiber polarization interference filter. Benefiting from the filter, the channel number, linewidth, uniformity and stabilization of the multiwavelength laser are greatly improved. The filter also works as a functional polarizing device in a nonlinear polarization rotation, leading to the multiwavelength operation. Instead of a highly nonlinear fiber, the single mode fiber is used to provide enough linearity and to reduce the splice loss. More than 80 wavelengths (within a 3 dB bandwidth), lasing with a linewidth of 0.03 nm and a signal-to-noise ratio of 33 dB, are obtained. The wavelength spacing of 0.164 nm agrees with the channel spacing of the filter, and can be flexibly controlled by adjusting the length of the filter.

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“…In [52], an Yb-doped MZI used as WSF, resulted in a laser with a SMSR of 40 dB, a linewidth of 0.07nm, and stability of 1 dB during 30 minutes of testing. In [53] a non-adiabatic microfiber Mach-Zehnder interferometer was used as a WSF, obtaining a laser with a SMSR of 53 dB, a linewidth of 0.01 nm, and stability 0.6 dB during 20 minutes of testing. Recently, in [48], the switchable emission was controlled by bending a bitaper MZI, obtaining a SMSR of about 32 dB.…”

Section: Introductionmentioning

confidence: 99%

Switchable Ytterbium Fiber Laser Based on a Symmetrical Long-Period Fiber Grating

et al. 2021

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In this study, a switchable ytterbium-doped fiber laser based on symmetrical long-period fiber grating (LPFG) is presented. The LPFG is used as a wavelength-selective filter (WSF). Utilizing this WSF, the laser can emit one, two, or multiple stable output beams by adjusting the temperature on the LPFG from 20 °C to 600 °C. In addition, switching is also possible by adjusting the curvature of the LPFG from 0.399 to 0.709 m -1 . The symmetrical LPFG was fabricated by combining the cladding shaping with the thermal core expansion techniques by using a CO2-laser LZM-100 glass-processing system. The experimental results show a side-mode suppression ratio (SMSR) of 49 dB and a linewidth of 0.06 nm, within the range from 1038 to 1080 nm. In conclusion, the main achievement of this switchable laser is the high SMSR and stable output for high values of temperature, using a repeatable, simple, easy construction, and cost-effective laser tuning technique.

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Switchable multiwavelength ytterbium-doped fiber laser using a non-adiabatic microfiber interferometer

Cited by 18 publications

References 24 publications

Tunable Multi-Wavelength Bright-Dark and Dark-Bright Pulse Pairs Fiber Lasers

Tunable Multi-Wavelength Bright-Dark and Dark-Bright Pulse Pairs Fiber Lasers

All-fiber polarization interference filter based uniform multiwavelength erbium-doped fiber laser

Switchable Ytterbium Fiber Laser Based on a Symmetrical Long-Period Fiber Grating

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