Design and applications of silica-based planar lightwave circuits

Kaneko, A.; Goh, Takashi; Yamada, Hiroyuki; Tanaka, Takuya; Ogawa, L.

doi:10.1109/2944.806745

Cited by 80 publications

(28 citation statements)

References 17 publications

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“…Janvit Tippinit and Weerachai Asawamethapant spent considerable efforts and proposed a smaller AWG with a lower insertion loss of 1.09 dB [9]. An N×N AWG has two main properties [10]. These properties are the so-called wavelength cyclic property (WCP) and free spectral range property (FSRP), respectively.…”

Section: Awg Architecture and Propertiesmentioning

confidence: 99%

A Frequency Reuse-Based Design for Flexible and Scalable Passive Optical Networks (PONs)

Mohamed¹

2017

NET

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Abstract:The accelerated growth in the bandwidth demand emphasizes the necessity to evolve from the currently deployed gigabit-class passive optical networks (PONs) to the next-generation optical access networks (NG-OANs). Different architectures were proposed in the literature in order to create a NG-OAN that is able to fulfilling the aforementioned goal. In this paper, a time-division multiplexing (TDM)/dense wavelength-division multiplexing (DWDM) scheme was proposed. The proposed scheme is sought to satisfy the current and future anticipated bandwidth demands. The architecture we proposed was able to allow different bit rate optical line terminals OLTs to use the same frequency band, and transmit their services over a 24 km shared feeder to 16 passive remote terminals (PRTs) with 16 ONU group for each. Each group can accommodate up to 16 ONU, total of 256 ONU/PRT, resulting in overall system capacity 4096 ONU. The architecture also allows the independentupgradeability for each optical network terminal ONU.

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Section: Awg Architecture and Propertiesmentioning

confidence: 99%

A Frequency Reuse-Based Design for Flexible and Scalable Passive Optical Networks (PONs)

Mohamed¹

2017

NET

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“…The polarization dependence of this device can be eliminated using a mode converter scheme (Inoue et al, 1994), which also makes it attractive for use as a wavelength router in optical N×N interconnection systems. According to the Wavelength Cyclic Property (WCP) provided by the AWG (Kaneko et al, 1999), if m identical aggregations (λ1 to λn) enter the N input ports of an N×N AWG, where m = n = N, they will be distributed among its output ports with no overlap, i.e., each wavelength is included once in each input port and once in each output port. Examples of possible wavelength assignments of a 4×4 AWG are shown in Table 1.…”

Section: Crosstalk In An N× × × ×N Awgmentioning

confidence: 99%

Analytical Analysis of In-Band Crosstalk, Out-of-Band Crosstalk and GVD-Based Power Penalties in DWDM and TDM/DWDM-PONS

Mohamed

Ab-Rahman

2015

Journal of Computer Science

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In addition to the ever-increasing demand for broader bandwidth per user, which results from the continuous development of new bandwidthhungry services and applications, the consequent upgrade from the currently deployed Time-Division Multiplexing Passive Optical Networks (TDMPONs) to Next-Generation Optical Access Networks (NG-OANs) has become inevitable. Different architectures for creating a NG-OAN have been proposed in the literature. Among those architectures, the DWDM and TDM/DWDM-Based OANs are very promising candidates. They were mainly proposed to exploit the large wavelength counts available in the fibre (its virtual unlimited bandwidth) to achieve a significant increase in the system capacity. Moreover, they allow coexistence in an open access environment among different network operators. In this study, we first analyze the impact of in-band crosstalk, out-of-band crosstalk to evaluate the performance of the Arrayed Waveguide Grating (AWG). The reason to focus on the AWG is due to this optical device is used almost in all DWDM and TDM/WDM-PONs. We then turn our attention to analyze the impact of group velocity dispersion GVD to estimate the maximum allowable bit rate for optical transmission without the need for using a Dispersion Management Technique (DMT) and/or a Forward Error Correction Technique (FECT). The analysis was performed using Matlab software (The Math works, Inc., Natick, MA, USA) and confirms that the in-band crosstalk has a stronger effect than the out-of-band crosstalk because its noise floor is reached at a lower crosstalk noise and with fewer crosstalk components. The in-band crosstalk noise should be kept below -37 dB and -34 dB to maintain a power penalty of less than 1 dB if 15 and 7 in-band crosstalk components are considered, respectively. The out-of-band crosstalk noise should be kept below -20.3 dB and -17.18 dB to maintain a power penalty of less than 1 dB if 240 and 56 out-of-band crosstalk components are considered, respectively. It was observed that the GVD noise floor is reached at a shorter fiber length as the bit rate increases and it was confirmed that a significant improvement in which the GVD noise floor is reached at longer fiber can be achieved if an externally modulated, small spectral-width source is used when a bit rate of 622 Mbps, 1 Gps, or 2.5 Gbps is used. However, a dispersion management technique becomes necessary if the bit rate increases to 10 Gbps or more.

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“…Each output port carries a replica of the same frequency range, although from different OLTs. According to the Free Spectral Range Property (FSRP), if two wavelengths enter the same input port of the N×N AWG, then they will emerge from the same output port with a separation determined by its periodic frequency range Free Spectral Range (FSR) (Kaneko et al, 1999).…”

Section: Tdm/dwdm-based Long-reach Optical Access Network (Tdm/dwdm-mentioning

confidence: 99%

Long-Reach Optical Access Networks (Lr-Oans): A Promising Candidate for Future Optical Access

Mohamed¹,

Ab-Rahman²

2014

American Journal of Applied Sciences

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The ever-increasing demand for broader bandwidth per user, which results from the continuous development of new bandwidth-hungry services and applications, creates the motivation to upgrade the currently deployed Time-Division Multiplexing Passive Optical Networks (TDM-PONs) to NextGeneration Optical Access Networks (NG-OANs). Beside the need for more bandwidth per user, a further extension in the range and an increase in the split ratio are highly desirable in PONs. These additional requirements can be achieved by adopting so-called Long-Reach Optical Access Networks (LR-OANs). LR-OANs offer a promising solution that ensures a significant number of users can be supported over a longer range. Moreover, they introduce a cost-effective approach in which both the access and metro segments of the telecommunication network are combined into one backhaul segment, which results in the consolidation of many central offices into one trunk-exchange. This cost-effective approach gave us the motivation to provide a comprehensive survey on the LR-OANs. In this study, we first provide a brief review of different potential technologies, proposed for next-generation optical access. We then provide a review of different stat-of-the-art LR-OAN architectures including opportunities and challenges in each one. A comparison among them based on key network specification is also provided.

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Design and applications of silica-based planar lightwave circuits

Cited by 80 publications

References 17 publications

A Frequency Reuse-Based Design for Flexible and Scalable Passive Optical Networks (PONs)

A Frequency Reuse-Based Design for Flexible and Scalable Passive Optical Networks (PONs)

Analytical Analysis of In-Band Crosstalk, Out-of-Band Crosstalk and GVD-Based Power Penalties in DWDM and TDM/DWDM-PONS

Long-Reach Optical Access Networks (Lr-Oans): A Promising Candidate for Future Optical Access

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