By Topic

Lasers and Electro-Optics Society Annual Meeting, 1993. LEOS '93 Conference Proceedings. IEEE

15-18 Nov. 1993

Filter Results

Displaying Results 1 - 25 of 387
  • Polarization switching by stimulated orientational scattering in birefringent nonlinear nematic liquid crystal film

    Publication Year: 1993, Page(s):321 - 322
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (121 KB)

    Summary form only given. Broadband birefringence, occurring in the visible through the far infrared spectral regime, is one of the many unique optical properties of nematic liquid crystals responsible for their emergence as an technologically important electro-optical material. Nematic liquid crystals are also optically highly nonlinear, through the large susceptibilities of their refractive indic... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Current status and future prospects for excimer laser angioplasty

    Publication Year: 1993
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (23 KB)

    Summary form only given. More than 6,000 patients have been successfully treated using excimer laser angioplasty techniques. Current limitations and possibilities for future instrument and system designs are discussed.<> View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Laser applications in glaucoma filtering surgery

    Publication Year: 1993
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (81 KB)

    Summary form only given. Laser sclerostomy essentially requires that the organic polymers of the sclera are fragmented and ejected in a gaseous state. This tissue phase change may be brought about by 1) photovaporization: thermal molecular fragmentation; 2) photodisruption: plasma expansion and predominantly mechanical molecular fragmentation, or 3) photodissociation: direct nonthermal decompositi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Appropriate use of lasers and new applications in dermatology

    Publication Year: 1993
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (54 KB)

    Summary form only given. The purpose of this presentation is to analyze comparatively different laser types, regardless of brand name, by demonstrating their optimal applications and to discuss several new applications previously not described. The degree of success, when treating is largely determined by the techniques of application, as well as choice of optimal wavelengths and configuration of ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • US WEST's broadband residential access architecture

    Publication Year: 1993
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (19 KB)

    Summary form only given, as follows. This paper discusses US WEST's aggressive deployment plans to build a broadband residential network offering common carrier access (video dial tone) for multiple video providers, also offering our customers a wealth of new service opportunities.<> View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Dynamics of photorefractive diffraction in KTa/sub 1-x/Nb/sub x/O/sub 3/ crystals

    Publication Year: 1993, Page(s):315 - 316
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (91 KB)

    Although the photorefractive properties of KTaNbO/sub 3/ (KTN) crystal, one of the first identified photorefractive crystals, have been investigated in more detail in recent years, its photorefractive diffraction dynamics have been rarely studied. However, these studies might be important for understanding the mechanism of the photorefractivity including the need for a complicated photorefractive ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A novel phase matching technique for polymer waveguide

    Publication Year: 1993
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (22 KB)

    Summary form only given. In order to obtain efficient second harmonic (SH) light in a waveguide, the uniformity of the waveguide has to be controlled within 50 /spl Aring/. A new phase matching technique, the so called electrical poling phase matching is proposed to release the severe condition.<> View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Femtosecond all-fiber ring lasers

    Publication Year: 1993
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (28 KB)

    Summary form only given. Erbium-doped fibers make it possible to develop compact, all-fiber sources of femtosecond pulses in the 1.5 /spl mu/m wavelength regime. In this paper we describe the operation of fully self-starting, passively modelocked, fiber ring lasers and discuss criteria for their design. Pulses with durations of 77 fs, and energies of 90 pJ and have been generated at a repetition r... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Tissue ablation

    Publication Year: 1993
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (20 KB)

    Summary form only given. The various physical mechanisms associated with tissue ablation using pulsed lasers are reviewed. Possible advantages of particular laser characteristics and irradiation conditions are discussed with emphasis on reducing collateral damage to surrounding tissue.<> View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fiber optics for free electron laser medical applications

    Publication Year: 1993
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (65 KB)

    Summary form only given. Free electron lasers (FEL) are interesting tools for tissue ablation research. A variety of fiber optics are available for delivery of mid-infrared laser energy. These include fluoride glasses, chalcogenide glasses, single-crystal sapphire and various hollow waveguide structures. Unfortunately, many infrared transmitting materials are easily damaged by high energy laser pu... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Unique clinical niches for the Er:YAG laser

    Publication Year: 1993
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (29 KB)

    Summary form only given. This presentation focuses on some of the unique aspects of Premier's research and clinical trials with erbium:YAG lasers including: ophthalmology-anterior capsulotomy, phacoemulsification, sclerostomy and refractive; dentistry-prevention of cavities, periodontal surgery and hard tissue; orthopedics-bone recontouring; neurosurgery and other specialities; fiberoptic delivery... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optoelectronic components for cellular communications

    Publication Year: 1993
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (33 KB)

    Summary form only given. Considerable effort has gone into the development of new optoelectronic devices which allow lightwave transmission systems to support data and video in mixed signal formats. Work in our group has focussed on a variety of technical problems, such as application specific integrated circuits, lasers, and a dual stage optical amplifier for use in these systems. Our most recent... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • InP-based waveguide components for wavelength division multiplexed optical communications system

    Publication Year: 1993
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (26 KB)

    Summary form only given. N/spl times/N arrayed waveguide multiplexers are powerful devices for WDM transmission systems and networks. High performance multiplexers can be fabricated on InP and monolithically integrated with a variety of active devices to build a wide range of novel, tunable WDM components.<> View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Changes and progress in broadband distribution networking

    Publication Year: 1993
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (19 KB)

    Summary form only given, as follows. The article focuses on recent technological and economic advances in broadband distribution networks and on the roles that different architectures are likely to play in the evolution of advanced loop networks.<> View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Nonlinear propagation, optical limiting and stimulated scattering in liquid crystalline fibers

    Publication Year: 1993, Page(s):114 - 115
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (132 KB)

    Summary form only given. Liquid crystals in their various ordered and disordered phases have been shown to possess large optical nonlinearities over a wide temporal [CW to picosecond] and spectral [visible to infrared] ranges. Consequently, a whole range of nonlinear optical phenomena has been observed in liquid crystalline systems. In this paper, we report our recent successful fabrication of liq... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Reliable, low-cost high power CW arrays and its effect on the marketplace

    Publication Year: 1993
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (28 KB)

    Summary form only given. Central to the future growth of the market for diode-pumped solid state lasers is the evolution of prices for high-quality, long-lived diode lasers and arrays used as pumps. The purpose of this paper is to discuss the relationship between lifetime, performance, volume and prices and the conditions needed for achievement of still lower prices.<> View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Microchip lasers and laser arrays

    Publication Year: 1993
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (40 KB)

    Summary form only given. Microchip lasers are miniature diode pumped solid state lasers which can be manufactured in large volume at low cost. Some of their characteristics include simple single-frequency operation, tunability over the gain bandwidth (up to 100 GHz) without a mode jump, short pulse (sub nanosecond) and high peak power capability and high speed (multi-GHz) frequency modulation capa... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Economic issues with diode-pumped solid-state lasers

    Publication Year: 1993
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (23 KB)

    Summary form only given. Many markets for high-performance diode-pumped solid state lasers are currently limited by the high cost of the semiconductor diode pump arrays. On the other hand, cost reduction for these same devices requires a developed market. We will address this and other obstacles facing commercialization of diode-pumped solid-state lasers.<> View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Processing of vertical cavity lasers

    Publication Year: 1993
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (23 KB)

    Summary form only given. Vertical-cavity laser performance can be greatly enhanced through optimized wafer processing techniques and design. Results of commercial vertical-cavity lasers processed in our fabrication facility will be reported.<> View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Proceedings of LEOS '93

    Publication Year: 1993
    Request permission for commercial reuse | PDF file iconPDF (284 KB)
    Freely Available from IEEE
  • Self-starting phase conjugation with liquid crystals

    Publication Year: 1993
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (162 KB)

    Summary form only given. Liquid crystals are technologically important electro-optical materials, as they possess many unique physical and electro-optical properties. They have also been shown to be technologically important nonlinear optical materials. Extraordinarily large optical nonlinearities are exhibited over the entire visible-near infrared-infrared spectrum; nonlinear optical responses to... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Multiwavelength fiber-amplifier cascades for networks

    Publication Year: 1993
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (23 KB)

    Summary form only given. The advent of practical optical gain raises the prospect of lightwave networks with dazzling capacities, including large multiwavelength systems. Erbium-doped fiber amplifiers can be arranged in large cascades that deliver strong, well-regulated light levels in single-wavelength networks. However, substantial new challenges arise in amplified multiwavelength networks. We s... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • High capacity, multiwavelength interoffice communications networks

    Publication Year: 1993
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (25 KB)

    Summary form only given. This paper introduces new architectures for implementing both uni-directional and bi-directional self-healing interoffice ring networks which use WDM for growth. The proposed architectures overcome the electronic limitations of SONET ADMs of about 10 Gb/s. The paper will also focus on different evolution strategies for interoffice networks from SONET rings to WDM rings.< View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • GaInAs(P)/InP ultra-fine structures: fabrication processes, quantum-wire lasers, and photonic devices

    Publication Year: 1993, Page(s):437 - 438
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (141 KB)

    Summary form only given. Recent progress in fabrication processes toward GaInAs(P)/InP low-dimensional quantum-well structures by EBX lithography followed by wet chemical etching and a low-pressure OMVPE regrowth is presented. A CW threshold current density of 816 A/cm/sup 2/ was obtained with a Ga/sub 0.66/In/sub 0.34/As/InP tensile-strained single-quantum-well laser 30-40 nm wide and with a 70 n... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Wavelength division multiplexed systems and networks

    Publication Year: 1993
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (40 KB)

    Summary form only given. Optical Wavelength Division Multiplexing (WDM) has emerged as an extremely flexible and efficient technique for accessing the vast optical fiber bandwidth. It also allows the provision of various services and flexible upgrading in optical networks. Furthermore, there is emerging technology for high-capacity wavelength routing dynamically reconfigurable network applications... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.