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The characteristics of all optical networks such as high speed, data carrying capacity and transparency make them suitable for emerged networks domain. This paper presents an overview of research challenges in the field of all optical communication networks. Various subdomains of an all optical system, for example device-level designs, communication technique-level designs and network-level designs have been extensively investigated and presented in this paper. Further, the related research issues under each category of these domains have been discussed. These issues constitute the basic criterion for further development in all optical domain.

Purpose of the study: The study aims to delve into the potential of the graphic novel in the Indian context, for which I have used the works of Amruta Patil and Appupen. The paper investigates the concerns of environment, mythology, and feminine experience and its presentation on a graphic-literary landscape. Methodology: The methodology used in the paper is that of direct observation. The researcher has used the contributions of Pramod K. Nayar and Emma Varughese further to push the boundaries of the graphic novel in India. Main Findings: The paper’s main findings have been to bring to light the complex mesh of interdisciplinary strategies required to scope the medium of the graphic novel. The paper narrows down on the success of the graphic novel as a medium to address the issues of the environment in a much more nuanced manner. Applications of the study: This research can be used to widen the scope of Literary Eco-criticism. It includes the medium of the graphic novel and seeks to examine its operative strategies when raising attention to the issues that pertain to the environment. Novelty/Originality of the study:  The terrain of the Indian Graphic Novel is still new and developing. While some studies have been done in this medium around the themes of the concerns of the cosmopolitan Indian, little has been done to look into the mythological roots and environmental concerns that this genre also illuminates. This essay is a significant step in that direction.

The use of multiple carriers in Orthogonal Frequency Division Modulation (OFDM) makes it bandwidth-efficient and suitable for modern communication such as Long-Term Evolution (LTE), Digital Subscriber Line (DSL) internet access, optical fiber communication, digital television, audio broadcasting, etc. In this paper, four modulation formats by using Coherent Optical Orthogonal Frequency Division Modulations (CO-OFDM) have been analyzed. These are Single Port Dual Polarization (SP DP) 16 QAM, Single-Port Single Polarization (SP SP) 16 QAM, Dual Port Single Polarization (DP SP) QPSK 16-QAM, and Single Port Dual Polarization (SP DP) QPSK. Operation characteristics such as Bit Error Rate (BER) versus fiber-length and BER versus bit-rate have been examined. The range of fiber length used for this investigation is from 0 Km to 1000 Km with loop count equal to 2 and the range of bit rate of operation is from 20 Gbps to 200 Gbps. The present investigation helps in determining the relative suitability of CO-OFDM formats at various bit-rates of operation for different fiber lengths.

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