UROP Project Listing System
Project Title:
A low-cost single-wavelength semiconductor laser source using a laser pointer
Supervisor:POON Andrew Wing On
Project Description:This project aims to develop a low-cost single-wavelength semiconductor laser source using a simple laser pointer. A laser pointer typically emits multiple wavelengths within a spectral band, thus it is not a single-wavelength source. Having a truly single-wavelength narrowband optical source is oftentimes desirable for high-data-rate optical communications, including communications in datacenters and optical wireless communications, yet such a light source is typically expensive. This project aims to develop such a light source by engineering a standard multiple-wavelength semiconductor laser chip from a laser pointer, and couple the laser light into an external micrometer-sized cavity. Such an external coupling provides an additional narrowband feedback to the laser to select a particular laser wavelength out of the multiple wavelengths. The student will be using a commercially available glass bead as the external cavity. The resulting external-cavity-coupled laser system will give a compact, low-cost and feedback-stabilized single-wavelength laser source. DELIVERABLES: A single-wavelength semiconductor laser source engineered from a laser pointer, with an external optical feedback using a glass bead or an equivalent optical structure.
Course type:UROP1000 UROP1100  
Applicant's Roles:[The project is opened to all students from SENG and SSCI] TASK OUTLINE: • Laboratory work with optics and photonics • Study the literature on the frontier of optics and photonics • Give monthly project presentations PRE-REQUISITE / REQUIREMENT: Strong interest in participating in UG research and hands-on laboratory work in optics and photonics.  
Applicant's Learning Objectives:• Learn the fundamental principles of optics and photonics relating to lasers 
Complexity of the project:Challenging 

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