## 2 Annotation of Articles Included in the Special Issue  
The present Special Issue is composed of a collection of **20** contributions, which include **5** relatively brief reviews summarizing recently obtained results in various areas of the guided-wave propagation in photonics, and **15** original papers reporting novel findings in this broad field. The contributions may be naturally grouped according to different forms and manifestations of the guided-wave propagation addressed in these works. Accordingly, the list of papers published in the Special Issue (following below) is divided into 11 topics **(A)-(K)**, and review articles are highlighted. In all cases, subjects addressed in the papers are sufficiently clearly defined by their titles. **(A)** A batch of three papers may be classified as addressing problems arising in the fundamental (general) theory of the guided wave transmission in conservative (i.e., lossless) nonlinear media. **(A1)** [PERSON], [PERSON], and [PERSON], Pulse Propagation Models with Bands of Forbidden Frequencies or Forbidden Wavenumbers: A Consequence of Abandoning the Slowly Varying Envelope Approximation and Taking into Account Higher-Order Dispersion. _Appl. Sci._**2017**, 7, 340. **(A2)** [PERSON]; [PERSON] Rogue Wave Modes for the Coupled Nonlinear Schrodinger System with Three Components: A Computational Study, _Appl. Sci._**2017**, 7, 559. **(A3)** [PERSON]; [PERSON]; [PERSON]; [PERSON] Modulational Instability in Linearly Coupled Asymmetric Dual-Core Fibers. _Appl. Sci._**2017**, 7, 645. **(B)** A related topic is the study of bright and dark soliton in various settings. This topic is represented in the Special Issue by the following four contributions, one of them being a review article:  
**(B1)** [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] Dark Solitons and Grey Solitons in Waveguide Arrays with Long-Range Linear Coupling Effects. _Appl. Sci._**2017**, 7, 311. **(B2)** [PERSON]; [PERSON]; [PERSON]; [PERSON] Stability and Dynamics of Dark-Bright Soliton Bound States Away from the Integrable Limit. _Appl. Sci._**2017**, \(7\), 388. **(B3)** [PERSON]; [PERSON]; [PERSON]; [PERSON] [PERSON] Polarization Properties of Laser Solitons. _Appl. Sci._**2017**, \(7\), 442. **(B4)** [PERSON]; [PERSON]; [PERSON] [PERSON] Soliton Content of Fiber-Optic Light Pulses. _Appl. Sci._**2017**, \(7\), 635. **(C)** Specific aspects of transmission in optical waveguides are considered in the following three papers (the first two address problems of direct relevance to practical applications):  
**(C1)** [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON] Demonstration of High-Speed Optical Transmission at 2 \(\upmu\)m in Titanium Dioxide Waveguides. _Appl. Sci._**2017**, \(7\), 63. **(C2)** [PERSON]; [PERSON]; [PERSON] Waveguiding Light into Silicon Oxycarbide. _Appl. Sci._**2017**, \(7\), 561. **(C3)** [PERSON]; [PERSON] Photon Propagation through Linearly Active Dimers. _Appl. Sci._**2017**, \(7\), 587. **(D)** Different aspects of the transmission of light in waveguides based on fiber Bragg gratings is considered in two papers:  
**(D1)** [PERSON]; [PERSON]; [PERSON] Designing a Novel High-Performance FBG-OADM Based on Finite Element and Eigenmode Expansion Methods. _Appl. Sci._**2017**, \(7\), 44. **(D2)** Review: [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] Ultrafast Optical Signal Processing with Bragg Structures. _Appl. Sci._**2017**, \(7\), 556. **(E)** A specific phenomenon of bound states existing in the continuous spectrum of a waveguide built as an array of dielectric spheres is summarized in the following Review article:  
[PERSON]; [PERSON]; [PERSON] Light Trapping above the Light Cone in One-Dimensional Arrays of Dielectric Spheres. _Appl. Sci._**2017**, \(7\), 147. **(F)** A topic of the propagation of self-accelerating beams in the form of Airy waves is overviewed in a Brief Review:  
[PERSON]; [PERSON]; [PERSON]; [PERSON] Guided Self-Accelerating Airy Beams-A Mini-Review. _Appl. Sci._**2017**, \(7\), 34.