Optics Study Report - Essay Example

Optics Study Report Article: Marouf, S., and N. Zekri. "Light Propagation In Ordered And Random One-Dimensional Systems By Cavity Formation." International Journal Of Modern Physics 20.11-13 (2006): 1661-1670. Article summary The difference between a conventional laser and a random laser is in the mode of the feedback obtained. Several theoretical and experimental studies have been undertaken to investigate the feedback systems or random lasers, using semi-conductor powder and other organic materials (Marouf and Zekri, 1661).

The difference between the conventional laser and the random laser has been identified in their feedback mechanisms, where the conventional laser applies a system of gain medium and cavity to give a feedback. The cavity is made up of a series of mirrors, which coherently provides the feedback for lasing. This is in total contrast to the random laser, which has no mirrors for use as the feedback mechanism, but applies a system of optical scattering in a disordered medium, to give the lasing feedback (Marouf and Zekri, 1662).

Random media is used to confine light in a very small region, which forms the basis of the operation of the random laser, through the interference of the scattered light, which forms light localization. Thus, a random laser does not use an optical cavity, but the rest of the principles of operation remain the same as those of a conventional laser. The evolution of the light transport behavior that occurs during the continuous transit of one-dimensional system from a highly ordered structure to a disordered structure forms the basis of the localization of light in a small region, which then allows a random laser to give lasing feedback, without using optical cavity (Marouf and Zekri, 1669).

The transit from a perfectly ordered to highly disordered structures of one-dimensional structures creates transmissions and decay lengths that are highly sensitive to disorder, which then enhances their localization in frequency regions, forming the basis of the random laser feedback system. Article critique Clarity and readability The principles discussed by this article are very precise, considering that the article delves deeply into the operation of both the conventional and the randomized lasers, with a focus on their differences.

The article is systematically and logically organized, starting with an introduction that explains the theme of the article and the activities that the article will be undertaking. It is organized in an experimental format, where the experiments undertaken are explained, and then the results of such experiment discussed, in relation to the theme of the article; to explain the operational differences between a conventional and a random laser, especially regarding their feedback systems (Marouf and Zekri, 1661).

The clarity and readability of the article is enhanced by the application of the question-answer model, where the article first poses some questions, and then embarks on answering them systematically. The article poses questions like “how is a cavity formed in such a random media with many random defects? How large is the cavity and how good is the cavity?” (Marouf and Zekri, 1664). Such questions prepare the reader for the next discussion, through providing accurate descriptions of the areas of focus of the discussion that follows.

Through such strategies, the article enhances the ability of the reader to follow and absorb the discussion fully, as opposed to a flow of discussion in prose, which does not break down the main ideas of the discussion, and the order in which they will be discussed. Visual displays, which include mathematical models and also diagrams, are systematically applied in the article, which serve to enhance the understanding of the discussion. Validity and significance The significance and relevance of the article cannot be doubted, especially inconsideration that the article explains a very fundamental principle.

The article delves into the investigation of the functionality of a random laser, with a special emphasis on its feedback system and the difference between its feedback system and that of a conventional laser (Noginov and Letokhov, 153). The results of the investigations are eventually realized, with a conclusion that a complete random system behaves like a broadband mirror through the entire frequency region, allowing light to experience high reflections from the multiple dialect layers that are present in the random laser.

It is through those multiple layers of high reflectivity that serve as two reflective mirrors, allowing for the formation of a resonant cavity between them, which then forms the basis of the random laser feedback system (Marouf and Zekri, 1669). The significance of the article is apparent in that, it has completely explained the process through which a random laser feedback system works, differentiating it from the feedback system of the conventional laser, which was the main objective of the study.

Additionally, the study is valid in that it is timely, considering that the concept of random laser operation is relatively new, compared to that of the conventional laser, and thus the study serves to create more insights into the new area of study (Shih-Hui, Cao and Ho, 364). However, the questions that the article leaves unanswered, which still lingers in mind are; how effective is the feedback system of the random laser compared to that of the conventional laser? What are the advantages of the random laser functionality principles, compared to that of the conventional laser?

References Marouf, S., and N. Zekri. "Light Propagation In Ordered And Random One-Dimensional Systems By Cavity Formation." International Journal Of Modern Physics 20.11-13 (2006): 1661-1670. Noginov, Mikhail A, and V S. Letokhov. Solid-state Random Lasers. New York: Springer, 2005. Print. Shih-Hui, Chang, Cao Hui, and Ho Seong Tiong. "Cavity Formation And Light Propagation In Partially Ordered And Completely Random One-Dimensional Systems." IEEE Journal Of Quantum Electronics 39.2 (2003): 364.