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Your search keyword '"Goh, Chee Seong"' showing total 23 results
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23 results on '"Goh, Chee Seong"'

2. Transdermal Maltose-Based Microneedle Patch as Adjunct to Enhance Topical Anesthetic before Intravenous Cannulation of Pediatric Thalassemic Patients Receiving Blood Transfusion: A Randomized Controlled Trial Protocol

Author

Abdul Jalal, Muhammad Irfan, primary, Ooi, Kai Shen, additional, Foo, Kai Cheong, additional, Hamzah, Azrul Azlan, additional, Goh, Chee Seong, additional, Dee, Chang Fu, additional, Ooi, Poh Choon, additional, Buyong, Muhamad Ramdzan, additional, Low, Teck Yew, additional, Chua, Xin Yun, additional, Lau, Doris Sie Chong, additional, Abdul Latiff, Zarina, additional, and Cheah, Fook Choe, additional

Published
2022
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3. Nickel 1,3,5-benzene-tricarboxylic acid-metal organic framework polymer composite saturable absorber

Author

Murad, Amir, Mohd Yusoff, Norita, Ying, Josephine Chyi Liew, Yaacob, Mohd Hanif, Goh, Chee Seong, Mahdi, Mohd Adzir, Murad, Amir, Mohd Yusoff, Norita, Ying, Josephine Chyi Liew, Yaacob, Mohd Hanif, Goh, Chee Seong, and Mahdi, Mohd Adzir

Abstract

This work demonstrates the fabrication of a saturable absorber with nickel 1,3,5-benzene-tricarboxylic acid (Ni-H3BTC)-metal organic framework (MOF) to generate soliton pulses in an erbium-doped fiber laser. The saturable absorber was fabricated by spin-coating Ni-H3BTC-MOF/polydimethylsiloxane composite on a tapered fiber as the encapsulation agent for light-matter interactions. The proposed cavity emitted a pulse laser at 1557.72 nm central wavelength with 3-dB bandwidth of 5.90 nm, pulse width of 907 fs, and average output power of 13.02 mW. At maximum pump power of 247.8 mW, the pulse energy was calculated to be 1.3 nJ at 10 MHz repetition rate. These results might assist as a footing to explore different types of available MOFs and their properties for the generation of ultrashort pulses.

Published
2022

4. Nickel 1,3,5-benzene-tricarboxylic acid-metal organic framework polymer composite saturable absorber for femtosecond pulse generation

Author

Murad, Amir, Mohd Yusoff, Norita, Ying, Josephine Chyi Liew, Yaacob, Mohd Hanif, Goh, Chee Seong, Mahdi, Mohd Adzir, Murad, Amir, Mohd Yusoff, Norita, Ying, Josephine Chyi Liew, Yaacob, Mohd Hanif, Goh, Chee Seong, and Mahdi, Mohd Adzir

Abstract

This work demonstrates the fabrication of a saturable absorber with nickel 1,3,5-benzene-tricarboxylic acid (Ni-H3BTC)-metal organic framework (MOF) to generate soliton pulses in an erbium-doped fiber laser. The saturable absorber was fabricated by spin-coating Ni-H3BTC-MOF/polydimethylsiloxane composite on a tapered fiber as the encapsulation agent for light-matter interactions. The proposed cavity emitted a pulse laser at 1557.72 nm central wavelength with 3-dB bandwidth of 5.90 nm, pulse width of 907 fs, and average output power of 13.02 mW. At maximum pump power of 247.8 mW, the pulse energy was calculated to be 1.3 nJ at 10 MHz repetition rate. These results might assist as a footing to explore different types of available MOFs and their properties for the generation of ultrashort pulses.

Published
2022

5. Noise-like pulse generation with tungsten trioxide/polydimethylsiloxane-clad microfiber saturable absorber

Author

Abdul Hadi, Muhamad Amir Waliuddin, Muhammad, Farah Diana, Mohd Yusoff, Norita, Alresheedi, Mohammed Thamer, Goh, Chee Seong, Mahdi, Mohd Adzir, Abdul Hadi, Muhamad Amir Waliuddin, Muhammad, Farah Diana, Mohd Yusoff, Norita, Alresheedi, Mohammed Thamer, Goh, Chee Seong, and Mahdi, Mohd Adzir

Abstract

We report the formation of noise-like pulse (NLP) with tungsten trioxide/polydimethylsiloxane-clad microfiber saturable absorber integrated in a ring-cavity erbium-doped fiber laser. The NLP operation was confirmed by the presence of a coherence spike on top of a broad pedestal in the autocorrelation trace, with the measured pulse width value of 410 fs and 3.56 ps respectively. By increasing the pump power from the mode-locking threshold of 280–3300 mW, the spectral bandwidth was stretched from 22.3 to 22.8 nm, while the output power increased from to 1.9 to 24.3 mW. The maximum pulse energy of 3.5 nJ was generated at a repetition rate of 7 MHz. The signal-to-noise ratio was measured to be 53.8 dB, which indicated a good stability of pulse laser.

Published
2022

10. Comparative Characteristics between L-Band EDFA, L-Band EDFA Utilising Single FBG and Dual Stage L-Band EDFA Utilising Dual FBG Configurations

Author

M. Safuan Zainudin, Mukhzeer Mohamad Shahimin, A. Zakiah Malek, N. A. M. Ahmad Hambali, N. Roshidah, Mohamad Halim Abd Wahid, Goh Chee Seong, and M. Shakirin Abu Hurera

Subjects
Optical amplifier, Active laser medium, Materials science, business.industry, L band edfa, General Medicine, Signal, Dual (category theory), Power (physics), Wavelength, Electronic engineering, Optoelectronics, business, Dual stage
Abstract

The development was conducted with three configurations of L-Band EDFA, L-Band EDFA utilising Single FBG and Dual Stage L-Band EDFA utilising Dual FBG. The configurations utilising the FBG using 35 meter M-12 Fibercore EDF as the gain medium to amplify the input signal power in the L-band region. The gain enhancement has shown by the Dual Stage L-Band EDFA utilising Dual FBG by injecting low input signal power of -10 dBm. The flat amplitude of OSNR at 33.358 dB was produced at injected wavelength from 1570 nm to 1605 nm.

Published
2015
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22. Generation of dissipative solitons and noise-like pulse from figure of eight fiber laser.

Author

Xu, Bo, Martinez, Amos, Set, Sze.Yun., Goh, Chee. Seong., and Yamashita, Shinji

Abstract

We demonstrate for the first time, a passively mode-locked fiber with a net dispersion operating in both dissipative solitons and noise-like pulse regimes using a mode-locking mechanism of nonlinear amplifying loop mirror. [ABSTRACT FROM PUBLISHER]

Published
2012

23. Turnkey, high power dissipative soliton all fiber laser using a hybrid modelocking mechanism.

Author

Martinez, Amos, Xu, Bo, Set, Sze Yun, Goh, Chee Seong, and Yamashita, Shinji

Abstract

We demonstrate a turnkey, high power mode-locked all fiber laser modelocked by the hybrid modelocking mechanism consisting of a nonlinear amplifying loop mirror and a carbon nanotube-saturable absorber. Nitrogen sealing prevents damage of the nanotubes permitting long term stability at high output powers. [ABSTRACT FROM PUBLISHER]

Published
2013

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