Dual wavelength fibre laser with tunable channel spacing using an SOA and dual AWGs by Ahmad, Harith, Zulkifli, Mohd Zamani, Latif, Amirah Abdul, Thambiratnam, Kavintheran, Harun, Sulaiman Wadi

“…In this paper, we propose and demonstrate a dual wavelength fibre laser (DWFL) based on the use of an inhomogeneously-broadened semiconductor optical amplifier (SOA) gain medium as well as two arrayed waveguide gratings (AWGs) together with two optical channel selectors (OCSs) and a broadband fibre Bragg grating (FBG) to generate dual wavelength output at variable channel spacings. The widest spacing obtained from the DWFL is 12.21 nm, while the narrowest spacing is 1.16 nm. …”

S-band multiwavelength ring Brillouin/Raman fiber laser with 20 GHz channel spacing by Ahmad, Harith, Zulkifli, Mohd Zamani, Hassan, Nor Ahya, Harun, Sulaiman Wadi

“…The MBRFL can generate a multiwavelength comb consisting of even and odd Stokes at an average power of -12 dBm and -14 dBm respectively, and by separating the even and odd Stokes outputs, a 20 GHz channel spacing is obtained between two consecutive wavelengths. …”

Tunable spacing dual wavelength Q-switched fiber laser based on tunable FBG device by M. Radzi, Nurnazifah, Abd Latif, Amirah, Ismail, Mohammad F., Liew, Josephine Ying Chyi, Awang, Noor A., Lee, Han K., Ahmad, Fauzan, Norizan, Siti F., Ahmad, Harith

“…The seven steps of wavelength spacing could be tuned from 0.3344 to 0.0469 nm spacing. …”

Tunable spacing dual-wavelength Q-switched fiber laser based on tunable FBG device by M. Radzi, Nurnazifah, A. Latif, Amirah, Ismail, Mohammad F., Liew, Josephine Y. C., Awang, Noor A., Lee, Han K., Ahmad, Fauzan, Siti F. Norizan, Siti F. Norizan, Ahmad, Harith

“…The seven steps of wavelength spacing could be tuned from 0.3344 to 0.0469 nm spacing. …”
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Investigation of Q-Switching Characteristics in Single- and Double-Spacing Multi-Wavelength Brillouin Erbium Fiber Laser by Tan, S.J., Jusoh, Z., Ali, N.M., Arof, Hamzah, Ahmad, Harith, Harun, Sulaiman Wadi

“…The performance of the multi-wavelength short pulse generation is investigated for two different BEFL configurations for single and double Brillouin spacing outputs. The Q-switched BEFL generates a pulse train with repetition rates of 10.36 and 20.41 kHz whose corresponding pulse widths are 13.21 and 3.84 μs for the single and double Brillouin spacing outputs, respectively. …”

0.16nm spaced multi-wavelength Brillouin fiber laser in a figure-of-eight configuration by Parvizi, Roghaieh, Arof, Hamzah, Ali, Norfizah Md, Ahmad, Harith, Harun, Sulaiman Wadi

“…At a Brillouin pump (BP) level of 15.3 dBm, 7 simultaneous lines with 20 GHz or 0.16 nm line spacing is achieved by removing the odd-order Stokes lines. …”

A Multi-Wavelength Brillouin Erbium Fiber Laser With Double Brillouin Frequency Spacing and Q-Switching Characteristics by Tan, S.J., Harun, Sulaiman Wadi, Ali, N.M., Ismail, M.A., Ahmad, Harith

“…A multiwavelength Brillouin Erbium fiber laser (MWBEFL) with double brillouin frequency spacing and Q-switching characteristics is demonstrated based on figure-of-eight configuration. …”

Tunable-spacing multi-wavelength yb-doped fiber laser (YDFL) based on temperature sensitive loop mirror by Lim, Kok Sing, Moghaddam, M.R.A., Harun, Sulaiman Wadi, Ahmad, Harith

“…The wavelength spacing and tuning span of the laser was larger if longer PMF segments were used in the loop mirror.…”

Spacing-Switchable Multiwavelength Fiber Laser Based on Nonlinear Polarization Rotation and Brillouin Scattering in Photonic Crystal Fiber by Shahabuddin, Nurul Shahrizan, Ahmad, Harith, Yusoff, Zulfadzli, Harun, Sulaiman Wadi

“…A new spacing-switchable multiwavelength erbium-doped fiber laser (EDFL) is demonstrated using switchable nonlinear polarization rotation (NPR) and stimulated Brillouin scattering (SBS) effects. …”

Carriers generated by mode-locked laser to increase serviceable channels in radio over free space optical systems by Ahmad, Harith, Soltanian, Mohammad Reza Khalifeh, Amiri, Iraj Sadegh, Alavi, Sayed Ehsan, Othman, Ali R., Mohd. Supa'at, Abu Sahmah

“…Mode-locked optical carriers with applicability for radio over free space optics (RoFSO) systems have been produced via a ring laser cavity incorporating an add/drop filter. …”

Closely spaced dual-wavelength fiber laser using an ultranarrow bandwidth optical filter for low radio frequency generation by Ahmad, Harith, Razak, N.F., Zulkifli, M.Z., Muhammad, F.D., Munajat, Y., Harun, Sulaiman Wadi

“…A dual-wavelength (DW) fiber laser with a closely spaced single longitudinal mode (SLM) output is proposed and demonstrated. …”

Single and Double Brillouin Frequency Spacing Multi-Wavelength Brillouin Erbium Fiber Laser With Micro-Air Gap Cavity by Tiu, Zian Cheak, Aidit, S.N., Hassan, N.A., Ismail, Mohammad Faizal, Ahmad, Harith

“…The micro-air gap cavity is constructed by aligning two polished fiber facets coaxially, and induces strong Fresnel reflection to switch the Brillouin frequency spacing from a double spacing to single spacing regime. …”

Generation of stable and narrow spacing dual-wavelength ytterbium-doped fiber laser using a photonic crystal fiber by Ahmad, Harith, Salim, M.A.M., Soltanian, M.R.K., Azzuhri, Saaidal Razalli, Harun, Sulaiman Wadi, Yasin, Moh

“…We demonstrate the design and operation of novel narrow spacing and stable dual-wavelength fiber laser (DWFL). …”

InGaAsP/InP Microring Resonator (MRR) Waveguide Used to Generate Soliton Comb with Tunable Channel Spacing by Alizadeh, F., Hashim, M.N., Ahmad, Harith, Amiri, I.S.

“…A novel system of tunable channel spacing soliton comb generation is presented using a PANDA ring resonator incorporated with an add-drop filter system. …”

Highly stable and tunable narrow-spacing dual-wavelength ytterbium-doped fiber using a microfiber Mach–Zehnder interferometer by Ahmad, Harith, Salim, M.A.M., Azzuhri, Saaidal Razalli, Harun, Sulaiman Wadi

“…We describe a successful demonstration of highly stable and narrowly spaced dual-wavelength output via an ytterbium-doped fiber laser. …”

Highly stable and tunable narrow-spacing dual-wavelength ytterbium-doped fiber using a microfiber Mach-Zehnder interferometer by Ahmad, Harith, Mat Salim, Muhammad Aizi, Azzuhri, Saaidal Razalli, Harun, Sulaiman Wadi

“…We describe a successful demonstration of highly stable and narrowly spaced dual-wavelength output via an ytterbium-doped fiber laser. …”

Tunable, low frequency microwave generation from AWG based closely-spaced dual-wavelength single-longitudinal-mode fibre laser by Ahmad, Harith, Latif, A.A., Talib, J.M., Harun, Sulaiman Wadi

“…Stable, closely-spaced Dual-Wavelength Fibre Lasers (DWFLs) have high potential for applications such as Radio-over-Fibre and optical sensing. …”

Stable Dual-Wavelength Coherent Source With Tunable Wavelength Spacing Generated By Spectral Slicing a Mode-Locked Laser Using Microring Resonator by Soltanian, M.R.K., Amiri, I.S., Chong, W.Y., Alavi, S.E., Ahmad, Harith

Mode Splitting Based on Polarization Manipulation in Few-Mode Fiber by Lee, Yen Sian, Lim, Kok Sing, Zaini, Muhammad Khairol Annuar, Ahmad, Harith

“…The proposed technique is a simple and efficient method for mode manipulation and management in various space-division multiplexing applications.…”

The surgical ablation on soft tissues using Ho:YAG laser with deviated beam fiber by Jaafar, Nurul Syahirah Aziz, Lim, Kok Sing, Zaini, Muhammad Khairol Annuar, Ahmad, Harith, Sepeai, Suhaila, Tan, Guan Hee, Tan, Geok Chin, Zainuddin, Zulkifli Md.

“…This can be attributed to amber space between the fiber and the tissue that allows the ejection of ablation debris and vapor from the ablation zone. …”