Harith Ahmad

By S. W. Harun, S. D. Emami, H. Arof, P. Hajireza and H. Ahmad

Part of the book: Modeling, Programming and Simulations Using LabVIEW™ Software

By S. W. Harun, M. Yasin, H. Z. Yang and H. Ahmad

Part of the book: Fiber Optic Sensors

By Siamak Emami, Hairul Azhar Abdul Rashid, Seyed Edris Mirnia, Arman Zarei, Sulaiman Wadi Harun and Harith Ahmad

Part of the book: Selected Topics on Optical Amplifiers in Present Scenario

By Kim Fook Lee, Yong Meng Sua and Harith B. Ahmad

Part of the book: Theory and Practice of Cryptography and Network Security Protocols and Technologies

By Kavintheran Thambiratnam, Harith Ahmad and Mukul C. Paul

Dual-Wavelength Fiber Lasers (DWFLs), which provide a simple and cost-effective approach for the optical generation of Microwave (MHz) and Terahertz (THz) radiation. The emphasis of this review is to trace the early development of DWFLs, including the issues and limitations faced by the various gain media right to the latest advancements in this field as well as their roles in generating the desired output. This review covers both the simple approaches of narrow-band filters and comb filters for microwave radiation generation, as well as the use of DWFLs with diethylaminosulfurtetrafluoride or LiNbO3 crystals for generating THz radiation.

Part of the book: Fiber Laser

By Mohd Afiq Ismail, Sulaiman Wadi Harun, Harith Ahmad and Mukul Chandra Paul

This chapter aims to familiarize readers with general knowledge of passive Q-switched and mode-locked fiber lasers. It emphasizes on carbon-based saturable absorbers, namely graphene and carbon nanotubes (CNTs); their unique electronic band structures and optical characteristics. The methods of incorporating these carbon-based saturable absorbers into fiber laser cavity will also be discussed. Lastly, several examples of experiments where carbon-based saturable absorbers were used in generating passive Q-switched and mode-locked fiber lasers are demonstrated.

Part of the book: Fiber Laser