A Q-switched erbium-doped fiber laser (EDFL) incorporating a graphene-oxidebased saturable absorber (SA) is proposed and demonstrated. The SA is fabricated by first dissolving graphene oxide nanopowder in water and subsequently using the thermophoresis effect to deposit it onto the fiber ferrule. The SA is integrated into a ring cavity EDFL, which

In this paper, a high-resolution fiber temperature sensor is proposed and demonstrated using the frequency beating technique. The sensor uses a constant wavelength (CW) at 1539.96 nm as the reference signal for the frequency beating technique. The sensor signal is provided by a fiber Bragg grating (FBG) tuned single-longitudinal mode (SLM) fiber la

A wide-band supercontinuum source generated by mode-locked pulses injected into a Highly Non-Linear Fiber (HNLF) is proposed and demonstrated. A 49 cm long Bismuth–Erbium Doped Fiber (Bi–EDF) pumped by two 1480 nm laser diodes acts as the active gain medium for a ring fiber laser, from which mode-locked pulses are obtained using the Non-Polariz

In this paper a tunable single-longitudinal mode (SLM), short-wavelength band (S-band) fiber laser using a conventional erbium-doped fiber (EDF) with a length of 3 m and a step index erbium dopant profile as opposed to the commonly used depressed cladding erbium-doped fiber (DC-EDF) is proposed and demonstrated. The proposed SLM fiber laser has a t

We describe and compare the performances of two crucial configurations for a tunable dual-wavelength fiber laser, namely, the linear and ring configurations. The performances of these two cavities and the tunability in the dual-wavelength output varied from 0.8 to 11.9 nm are characterized. The ring cavity provides a better performance, achieving a

Background Disasters are unpredictable events that kill and affect people, demolish properties and disrupt environment. During such events, nurses play a vital role in dealing with the victims. It is therefore crucial for nurses to be prepared in facing the aftermath of disasters. The aim of this study was to determine knowledge, attitude and pract

Malaysia is a multi-ethnic and multi-cultural nation. Such make up is related to the legacy arising out of long history of British colonialism over the country. Under Britsh rule, various ethnic groups were "separated" in various forms of bordering (Malays were expected to stay in villagers to be farmers, Chinese were to be shopkeepers in t

In this review article, we report the recent development and utilization of silica from rice husk (RH)for the immobilization of transition metals and organic moieties. Silicon precursor was obtained in the form of sodium silicate and as rice husk ash (RHA). Sodium silicate was obtained by direct silica extraction from rice husk via a solvent extrac

This study investigates the perception of Malaysian housemen on what the indicators of competence are in the medical practice. This derives from the need for the interns to have the requisite skill needed to make them competent in the post-medical school medical practice. A survey questionnaire was administered on all 2,046 housemen in all medical

This paper describes and proposes an efficient and effective framework for the design and development of a speaker-independent continuous automatic Arabic speech recognition system based on a phonetically rich and balanced speech corpus. The speech corpus contains a total of 415 sentences recorded by 40 (20 male and 20 female) Arabic native speaker