R. Bryce, R. DeCorby, C. Haugen, Y. Tsui, J. McMullin
{"title":"Grating assisted optical add drop filter modeling and fabrication","authors":"R. Bryce, R. DeCorby, C. Haugen, Y. Tsui, J. McMullin","doi":"10.1117/12.473939","DOIUrl":"https://doi.org/10.1117/12.473939","url":null,"abstract":"The design of a grating assisted directional coupler filter is outlined for a chalcogenide glass based device. The refractive index dispersion for As2Se3 is given and design equations are heuristically developed. Sensitivity analysis of these equations suggests a quick, inexpensive, and effective means to correct for the exponential sensitivity on waveguide separation in directional coupler based designs. Filter characteristics are found with the transfer matrix method and a simple tapering methodology is introduced to allow for realizable devices.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121153637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
W. Holzer, A. Penzkofer, R. Philip, H. Tillmann, C. Bader, H. Hoerhold
{"title":"Photophysical and lasing characterization of neat films of 4-methyl-TPD and of a 4-methyl-TPD phenyl substituted MEH-PPV copolymer","authors":"W. Holzer, A. Penzkofer, R. Philip, H. Tillmann, C. Bader, H. Hoerhold","doi":"10.1117/12.474834","DOIUrl":"https://doi.org/10.1117/12.474834","url":null,"abstract":"Wave-guided travelling-wave lasing (amplification of spontaneous emission in waveguide) is studied on neat films of the triphenylamine dimer 4-methyl-TPD, and of the 4-methyl-TPD phenyl substituted MEH-PPV copolymer TPD(4M)-MEH-P-PPV. Laser action is achieved by transverse pumping neat films on glass substrates with picosecond excitation pulses (wavelength 347.15 nm, duration 35 ps). Lasing occurs at 422 nm for 4-methyl-TPD and at 544 nm for TPD(4M)-MEH-P-PPV. The optical constants (absorption spectra and refractive index spectra), the absorption cross-section spectra, fluorescence quantum distributions, fluorescence quantum yields, and fluorescence lifetimes of the samples are determined for photo-physical characterization. The laser performance and the photo-physical parameters of 4-methyl-TPD and TPD(4M)-MEH-P-PPV are compared with results on MEH-PPV.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129559985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Proulx, S. Morency, A. Croteau, K. Le Foulgoc, C. Paré, R. Vallée, J. Lauzon
{"title":"Design, fabrication, and characterization of holey fibers","authors":"A. Proulx, S. Morency, A. Croteau, K. Le Foulgoc, C. Paré, R. Vallée, J. Lauzon","doi":"10.1117/12.474396","DOIUrl":"https://doi.org/10.1117/12.474396","url":null,"abstract":"Since the beginning of optical fiber communications, many fiber designs, driven by the desire to extend the fiber limited performances, have been proposed. In the last decade, the most innovative concept that came out is probably the HF (Holey Fibre). This new fiber design consist of a pure silica fiber with a periodic array of air holes running along the length of the fiber. Usually, the air holes forming the cladding region are arranged in an hexagonal lattice and the introduction of a defect, absence of a hole, in the center of this periodic structure creates the core of the fiber. Over the past few years, impressive possibilities offered by this new type of fiber have been demonstrated in various fields of optical fiber technology such as single-mode fiber, high optical power guidance, polarization control, dispersion compensation, soliton propagation, continuum generation, fiber lasers and amplifiers, remote sensing, etc. In this paper, we review the technology and present our design, fabrication capability, as well as some results obtained with our HFs.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116141935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Draude, N. Reinke, A. Perschke, H. Franke, R. Lessard, T. Fuhrmann
{"title":"Photoinduced surface reliefs in an organic azo-glass","authors":"A. Draude, N. Reinke, A. Perschke, H. Franke, R. Lessard, T. Fuhrmann","doi":"10.1117/12.473952","DOIUrl":"https://doi.org/10.1117/12.473952","url":null,"abstract":"The formation of holographic gratings in an azo-glass is investigated for the simple case of an intensity grating in the s-polarization of the recording beams. A dual grating is formed as a function of time with a refractive index grating and a relief grating. The diffraction efficiency as a function of recording time is discussed in a model of 2 consecutive processes with a phase shift. A material transport process is involved in the formation of relief patterns. A thermal erasure process at the glass transition is compared with an optical process.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121021883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Fiber Bragg gratings and chromatic dispersion","authors":"R. Lachance, Y. Painchaud, A. Doyle","doi":"10.1117/12.473966","DOIUrl":"https://doi.org/10.1117/12.473966","url":null,"abstract":"Since the late 1990s, steady advances in wavelength division multiplexing (WDM) technology have provided better ways to increase the capacity of optical networks. Three significant trends become evident in long-haul transmission system, namely the continual increase in the number of dense WDM channels, the increase in data rates from 2.5 Gb/s to today's 10 Gb/s, to tomorrow's 40 Gb/s, and finally longer distances between electrical regeneration sites. These trends towards an increased optical network capacity are now clashing with chromatic dispersion. This paper will discuss the application of high-end FBGs to telecommunication systems, focusing on their performances with respect to chromatic dispersion. Two types of components will be discussed: low-dispersion FBG WDM filters and FBG dispersion compensators. High-quality ultra-low dispersion FBGs have been fabricated successfully and their key attributes will be discussed. Advanced applications of FBGs for chromatic dispersion compensation, such as broadband multi-channel dispersion and slope compensation, will be covered. In particular, FBG dispersion slope compensators can be used in conjunction with Dispersion Compensating Fiber (DCF) to fully manage the dispersion over a large number of WDM channels. The need for tunable dispersion compensation at 40 Gb/s transmission rates will be discussed. Experimental results will also be presented.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134414461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Polarization switched optical fiber laser for AC optical nulling bridges","authors":"J. Hernández-Cordero","doi":"10.1117/12.474306","DOIUrl":"https://doi.org/10.1117/12.474306","url":null,"abstract":"Theoretical analysis has shown that a switched optical bridge (Sw-OB), in which a single beam is alternated between the reference and measurement optical paths, has the potential of rendering sensitive measurements of transmittance variations in optical devices. For a laser source with adequate switching characteristics, measurements limited by the shot-noise of the photodetectors are predicted. This paper demonstrates the feasibility of realizing a polarization switched fiber laser that could find direct application for Sw-OBs. Full switching between two orthogonal polarization states is achieved by adjusting the coupling between the polarization modes and by varying the losses for each mode independently. Although some bulk optical elements are used for this demonstration, an all-fiber version of the proposed laser configuration could be realized by using polarization sensitive fiber devices.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":"4833 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131216271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
L. Domash, E. Ma, N. Nemchuk, A. Payne, Ming-Siou Wu
{"title":"Tunable thin film filters based on thermo-optic semiconductor films","authors":"L. Domash, E. Ma, N. Nemchuk, A. Payne, Ming-Siou Wu","doi":"10.1117/12.474383","DOIUrl":"https://doi.org/10.1117/12.474383","url":null,"abstract":"Thermo-optic layers of thin film semiconductors are deposited by PEVCD to create thermally tunable bandpass filters for WDM optical networks. Amorphous semiconductor films, adapted from the solar cell and display industries, are the primary ingredient. Single-cavity tunable filters with FWHM=0.085 nm, >40 nm tuning range, and insertion losses 0.2-4 dB are demonstrated. Key enablers for this new family of index-tunable thin film devices are PECVD deposition, large internal temperature changes >400C, high conductivity polysilicon heater films, and extremely robust film adhesion. Possible applications include optical monitoring, add/drop multiplexing, dynamic gain equalization, and dispersion compensation.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":"349 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133746052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"High resolution index of refraction profiling of optical waveguides","authors":"R. Taylor, C. Hnatovsky","doi":"10.1117/12.473921","DOIUrl":"https://doi.org/10.1117/12.473921","url":null,"abstract":"A comparison is made between three high spatial resolution index of refraction profiling techniques:reflection-NSOM, microreflection and AFM plus selective chemical etching using the very small elliptical core of a polarization maintaining E-fiber from Andrew Corporation as a test waveguide.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134182817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A new waveplate model of charactering the system impact due to PMD","authors":"P. Lu, Liang Chen, X. Bao","doi":"10.1117/12.474300","DOIUrl":"https://doi.org/10.1117/12.474300","url":null,"abstract":"A new waveplate model of polarization mode dispersion (PMD) is proposed. Using finite number of polarization maintaining fiber (PMF) sections in the new model, it can generates any differential group delay (DGD) values, while the conventional model produces zero possibility beyond certain DGD range. Importance-sampling technique is used to simulate the DGD probability density at large DGD range. Simulation results show that the DGD probability density function generated by the new model is Maxwellian even when the probability density is as low as 10-35.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132138524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. Mach, M. Dolinski, K. Baldwin, J. Rogers, C. Kerbage, R. Windeler, B. Eggleton
{"title":"Multi-functional, tunable microfluidic optical fiber devices","authors":"P. Mach, M. Dolinski, K. Baldwin, J. Rogers, C. Kerbage, R. Windeler, B. Eggleton","doi":"10.1117/12.474404","DOIUrl":"https://doi.org/10.1117/12.474404","url":null,"abstract":"By introducing microfluidic plugs into interior fiber microchannels, we have developed a new category of active, tunable optical fiber. The positions and optical properties of the fluidic plugs can be directly controlled by utilizing actuators and pumps located on the fiber surface, thereby allowing the propagation characteristics of certain optical fiber modes to be usefully adjusted. These hybrid microfluidic/silica waveguides preserve the advantages of conventional, passive optical fiber, while at the same time providing versatile tuning capabilities. Examples of variable narrow and broadband all-fiber filters are described here. These fluidic fiber devices have the potential to be important technologies for next generation optical networks.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":" 36","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132094475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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