Titanium dioxide-based Q-switched dual wavelength in the 1 micron region by Ahmad, Harith, Salim, M.A.M., Ali, Z.A., Ismail, Mohammad Faizal, Thambiratnam, K., Latiff, A.A., Nayan, N., Harun, Sulaiman Wadi

Graphene-chitin bio-composite polymer based mode locker at 2 micron region by Zuikafly, Siti Nur Fatin, Ahmad, Harith, Wan Nawawi, Wan Mohd Faizal, Yahaya, H., Ibrahim, M. H., Abd. Latif‬, ‪Amirah, Ahmadi, F.

“…Coupled with a newly introduced chitin nanofiber as the host polymer, it was demonstrated and reported as passive mode locker at 2-micron region. The conventional soliton operated at operating wavelength of 1982.7 nm with repetition rate of 11.35 MHz. …”
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Fiber laser at 2 micron region using double-clad thulium/ytterbium co-doped yttria-alumino-silicate fiber by Harun, Sulaiman Wadi, Saidin, Norazlina, Damanhuri, Siti Sarah Ahmad, Ahmad, Harith, Halder, Arindam, Paul, Mukul Chandra, Das, S., Pal, Mrinmay, Bhadra, Shyamal Kumar

Widely Tunable Dual-Wavelength Thulium-doped fiber laser Operating in 1.8-2.0 mm Region by Ahmad, Harith, Samion, Muhamad Zharif, Thambiratnam, Kavintheran, Yasin, Moh

“…The widest channel spacing obtained is 183.6 nm, and both lasing wavelengths can be tuned across the 1.8-2.0-micron region by just adjusting the passbands of the TBPFs. …”

Fiber optic displacement sensor based on micro-thickness measurement using bundled fiber and concave mirror by Yasin, Moh, Harun, Sulaiman Wadi, Ahmad, Harith

“…In this paper, we propose and demonstrate a simple yet accurate optical fiber based sensor capable of performing micron and sub-micron thickness measurement. The proposed sensor is based on reflective displacement sensor, which consists of a 785 nm light source, multimode plastic bundle fiber probe, a concave mirror target and a silicon detector. …”

Fiber optic displacement sensor for micro‐thickness measurement by Ahmad, Harith, Yasin, Moh, Thambiratnam, Kavintheran, Harun, Sulaiman Wadi

“…Purpose-The purpose of this paper is to propose and demonstrate a simple yet accurate optical fibre based sensor capable of performing micron and sub-micron thickness measurement. Design/methodology/approach-The proposed sensor consists of a multimode plastic probe, three He-Ne lasers and translation stages along with a silicon photodiode and a lock-in amplifier to measure the output voltage as the displacement of the sensor is increased. …”

Q-switched ytterbium-doped fiber laser with zinc oxide based saturable absorber by Ahmad, Harith, Salim, M.A.M., Ismail, Mohammad Faizal, Harun, Sulaiman Wadi

“…This is the first time, to the authors' knowledge, that a ZnO based SA has been used to generate pulses in the 1 micron region with a YDFL.…”

The generation of passive dual wavelengths Q-switched YDFL by MoSe2film by Ahmad, Harith, Rashid, F.A.A., Azzuhri, Saaidal Razalli, Salim, M.A.M., Shaharuddin, R.A., Ismail, M.A., Razak, M.Z.A.

“…We have determined consistent dual-wavelength Q-switching pulses for the 1-micron region.…”

Fiber optic displacement sensor for imaging of tooth surface roughness by Rahman, H.A., Rahim, H.R.A., Ahmad, Harith, Yasin, M., Apsari, R., Harun, Sulaiman Wadi

“…The experimental results indicated the capability of implementation of the displacement sensor for the imaging of the tooth surface profile as well as a micron-size roughness estimator with a measurement error of less than 2.35%.…”

Multi-wavelength thulium-doped fiber laser operating at slope efficiency of 16.57% in linear cavity configuration by Shamsudin, H., Latiff, A.A., Razak, N.N., Ahmad, Harith, Harun, Sulaiman Wadi

“…The proposed multi-wavelength TDFL is suitable for a multitude of real-world applications such as range-finding, medicine and spectroscopy due to its ability to operate in the eye-safe region of 2 micron.…”

1941 nm Q-switched thulium-doped fiber laser with a multi-layer black phosphorus saturable absorber by Latiff, A.A., Rusdi, M.F.M., Jusoh, Z., Yasin, M., Ahmad, Harith, Harun, Sulaiman Wadi

“…Our results show that multi-layer BP is a promising SA for Q-switching laser operation in 2-micron region.…”

Ultrafast mode-locked dual-wavelength thulium-doped fiber laser using a Mach-Zehnder interferometric filter by Sharbirin, Anir Syazwan, Samion, Muhamad Zharif, Ismail, Mohammad Faizal, Ahmad, Harith

“…The proposed laser uses a thulium-doped fiber for lasing in the two-micron region and exploits the interferometric spectrum of the TMZF to produce dual peaks with nearly equal magnitude. …”

Graphene-PVA saturable absorber for generation of a wavelength-tunable passively Q-switched thulium-doped fiber laser in 2.0 µm by Ahmad, Harith, Samion, Muhamad Zharif, Sharbirin, Anir Syazwan, Norizan, Siti Fatimah, Aidit, Siti Nabila, Ismail, Mohammad Faizal

“…The proposed laser would have multiple applications for operation near the 2.0 micron region, especially for bio-medical applications and range-finding.…”