{"title":"Trace moisture detection using near infrared diode lasers","authors":"C. Hovde, J. A. Silver","doi":"10.1109/LEOSST.2000.869710","DOIUrl":"https://doi.org/10.1109/LEOSST.2000.869710","url":null,"abstract":"The measurement of trace concentrations of water vapor is important in many industrial applications, especially semiconductor fabrication. A variety of methods exists for measuring water vapor at concentrations approaching one nmole/mole (one ppb). We have chosen to focus on wavelength modulation spectroscopy (WMS) as a practical method to achieve sufficient sensitivity. WMS is a variation of transmission spectroscopy, and thus it shares the calibration benefits of other Beer's Law techniques. By rapidly modulating the laser wavelength, laser 1/f noise is avoided, so very small changes in laser power can be measured. When WMS is combined with a multiple pass absorption cell, ultrasensitive detection of water vapor is possible. This approach has the desired combination of sensitivity and accuracy while enjoying the benefits of rugged communications-type diode lasers.","PeriodicalId":415720,"journal":{"name":"2000 Digest of the LEOS Summer Topical Meetings. Electronic-Enhanced Optics. Optical Sensing in Semiconductor Manufacturing. Electro-Optics in Space. Broadband Optical Networks (Cat. No.00TH8497)","volume":"214 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132269303","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}
H. Nakano, J. Ito, H. Furuhashi, A. Maeda, T. Yoshikawa, Y. Uchida, K. Kojima, A. Ohashi, S. Ochiai, T. Mizutani
{"title":"Nonlinear optical properties and morphologies of VOPc thin film prepared on polyimide film","authors":"H. Nakano, J. Ito, H. Furuhashi, A. Maeda, T. Yoshikawa, Y. Uchida, K. Kojima, A. Ohashi, S. Ochiai, T. Mizutani","doi":"10.1109/LEOSST.2000.869740","DOIUrl":"https://doi.org/10.1109/LEOSST.2000.869740","url":null,"abstract":"If the third harmonic phase matching condition of a nonlinear optical material is satisfied, the efficiency of third harmonic wave is improved, and the TH strength increases in proportion to the square of the film thickness. The phase matching condition was examined from the relation of the TH strength vs. the film thickness. The UV/VIS spectra of the film is studied.","PeriodicalId":415720,"journal":{"name":"2000 Digest of the LEOS Summer Topical Meetings. Electronic-Enhanced Optics. Optical Sensing in Semiconductor Manufacturing. Electro-Optics in Space. Broadband Optical Networks (Cat. No.00TH8497)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116099562","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":"Design and operation of the Hopkins Ultraviolet Telescope","authors":"S. Durrance","doi":"10.1109/LEOSST.2000.869738","DOIUrl":"https://doi.org/10.1109/LEOSST.2000.869738","url":null,"abstract":"The Hopkins Ultraviolet Telescope (HUT) was flown aboard the Space Shuttle Columbia for 9 days in December 1990 and the Space Shuttle Endeavour for 17 days in March 1995. Spectrophotometric observations of numerous astronomical sources were made throughout the far ultraviolet. In this paper we describe the HUT instrument and its performance in orbit. The optical system consists of a 90 cm diameter f/2 primary mirror and a prime-focus, Rowland circle spectrograph.","PeriodicalId":415720,"journal":{"name":"2000 Digest of the LEOS Summer Topical Meetings. Electronic-Enhanced Optics. Optical Sensing in Semiconductor Manufacturing. Electro-Optics in Space. Broadband Optical Networks (Cat. No.00TH8497)","volume":"232 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121712580","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":"Optoelectronics for multi-terabit intelligent wavelength division multiplexing networks","authors":"C. DeCusatis","doi":"10.1109/LEOSST.2000.869690","DOIUrl":"https://doi.org/10.1109/LEOSST.2000.869690","url":null,"abstract":"This paper describes some of the opportunities for electronic enhancement of fiber optic systems, and presents some new results of device evaluations in this area. Recent standards efforts have turned their attention to data transmission rates of 10 gigabit/second and above for a single data link. This is being driven by a number of factors, including new industry standards efforts. Serial transceivers for 10 gigabit/second have been demonstrated, but present problems dealing with signal integrity between CMOS logic chips and the optical physical layer. One proposal is to integrate the 10 Gigabit serialize/deserialize function and data encode/decode function into the media access layer as a single CMOS ASIC, while an eye opener function and media dependent input/output interface would be implemented as a hybrid of SiGe and GaAs technologies. We have helped develop new SiGe manufacturing processes such as ultrahigh vacuum chemical vapor deposition which allow integration of SiGe with standard CMOS circuitry to form BiCMOS devices using sub-0.5 micron designs and standard 200 mm wafer substrates. SiGe cross point switches have been demonstrated with 17/spl times/17 channels capable of 3.2 gigabit/second data rates while requiring only 3.3 V and dissipating only 3.7 W of power. SiGe transimpedance amplifiers designed for 10 gigabit links have exhibited 3 GHz bandwidth with 280 nA room mean square noise, sensitivity down to 19 microamps, and power consumption as low as 470 mW.","PeriodicalId":415720,"journal":{"name":"2000 Digest of the LEOS Summer Topical Meetings. Electronic-Enhanced Optics. Optical Sensing in Semiconductor Manufacturing. Electro-Optics in Space. Broadband Optical Networks (Cat. No.00TH8497)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116856843","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}
S. L. Ng, H.S. Lim, B. Ooi, Y. Lam, Y. Zhou, Y. Chan, V. Aimez, J. Beauvais, J. Beerens
{"title":"Monolithic InGaAs/InGaAsP electro-absorption intensity modulator fabricated using low energy arsenic ion implantation induced intermixing","authors":"S. L. Ng, H.S. Lim, B. Ooi, Y. Lam, Y. Zhou, Y. Chan, V. Aimez, J. Beauvais, J. Beerens","doi":"10.1109/LEOSST.2000.869676","DOIUrl":"https://doi.org/10.1109/LEOSST.2000.869676","url":null,"abstract":"10-channel monolithic multiple wavelength electro-absorption (EA) modulators have been fabricated onto a single chip using a one-step quantum well intermixing technique based on As/sup 2+/ ion implantation through a graded thickness silicon dioxide mask. Each individual modulator has a dimension of 400/spl times/500 /spl mu/m/sup 2/, 50 /spl mu/m width of active window, 500 /spl mu/m cavity length and 20 /spl mu/m width of isolation trench. The EA intensity modulators were characterized at room temperature using end-fire-coupling technique. Samples used in this study had a InGaAs/InGaAsP MQW (five quantum wells) laser structure grown by metal-organic vapor phase epitaxy and were of the form of a stepped graded index heterostructure.","PeriodicalId":415720,"journal":{"name":"2000 Digest of the LEOS Summer Topical Meetings. Electronic-Enhanced Optics. Optical Sensing in Semiconductor Manufacturing. Electro-Optics in Space. Broadband Optical Networks (Cat. No.00TH8497)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115175800","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":"Fast and robust measurement of optical channel gain","authors":"A. la Cour-Harbo, J. Stoustrup, L. Villemoes","doi":"10.1109/LEOSST.2000.869695","DOIUrl":"https://doi.org/10.1109/LEOSST.2000.869695","url":null,"abstract":"We present a numerically stable and computational simple method for fast and robust measurement of optical channel gain. By transmitting adaptively designed signals through the channel, good accuracy is possible even in severe noise conditions.","PeriodicalId":415720,"journal":{"name":"2000 Digest of the LEOS Summer Topical Meetings. Electronic-Enhanced Optics. Optical Sensing in Semiconductor Manufacturing. Electro-Optics in Space. Broadband Optical Networks (Cat. No.00TH8497)","volume":"241 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123008633","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 configurable architecture for smart pixel research","authors":"J. F. Cantin, F. Beyette","doi":"10.1109/LEOSST.2000.869702","DOIUrl":"https://doi.org/10.1109/LEOSST.2000.869702","url":null,"abstract":"We propose a general purpose, smart pixel based photonic information processing architecture comprised of RISC processing pixels and a reconfigurable micro instruction store. Implemented with a photonic VLSI technology the device is suitable for prototyping photonic information processing systems.","PeriodicalId":415720,"journal":{"name":"2000 Digest of the LEOS Summer Topical Meetings. Electronic-Enhanced Optics. Optical Sensing in Semiconductor Manufacturing. Electro-Optics in Space. Broadband Optical Networks (Cat. No.00TH8497)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123511195","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":"Optoelectronic page-oriented database filter based on a single chip photonic VLSI design","authors":"J. Tang, B.K. Lee, R. Chi, A. Steckl, F. Beyette","doi":"10.1109/LEOSST.2000.869704","DOIUrl":"https://doi.org/10.1109/LEOSST.2000.869704","url":null,"abstract":"A database filter suitable for accessing optical storage devices is presented. This photonic VLSI chip includes a smart pixel array that selects words matching a search criterion and control circuitry that interfaces the filter chip with an electronic host computer.","PeriodicalId":415720,"journal":{"name":"2000 Digest of the LEOS Summer Topical Meetings. Electronic-Enhanced Optics. Optical Sensing in Semiconductor Manufacturing. Electro-Optics in Space. Broadband Optical Networks (Cat. No.00TH8497)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115342263","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}
S. Johnson, M. Beaudoin, M. Boonzaayer, E. Grassi, Y. Zhang
{"title":"Real-time control of substrate temperature using band edge thermometry","authors":"S. Johnson, M. Beaudoin, M. Boonzaayer, E. Grassi, Y. Zhang","doi":"10.1109/LEOSST.2000.869726","DOIUrl":"https://doi.org/10.1109/LEOSST.2000.869726","url":null,"abstract":"The nested loop approach is a convenient way to add an accurate external temperature sensor to the conventional Eurotherm-thermocouple control loop found in molecular beam epitaxy systems. In this case, the outer control loop updates the Eurotherm (thermocouple) setpoint based on the difference between the user setpoint and the value measured by the external sensor, using a proportional-integral-derivative algorithm implemented in control software. This method has the advantage that the Eurotherm-thermocouple control system is left intact, so that, in the event the external sensor or control computer fails, the heater power will continue to be controlled.","PeriodicalId":415720,"journal":{"name":"2000 Digest of the LEOS Summer Topical Meetings. Electronic-Enhanced Optics. Optical Sensing in Semiconductor Manufacturing. Electro-Optics in Space. Broadband Optical Networks (Cat. No.00TH8497)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124826384","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":"IP over WDM traffic engineering","authors":"J.Y. Wei, K.H. Liu","doi":"10.1109/LEOSST.2000.869743","DOIUrl":"https://doi.org/10.1109/LEOSST.2000.869743","url":null,"abstract":"Traffic engineering in IP/WDM networks can be pursued in two fashions: overlay and integrated. With overlay traffic engineering, operations in one layer can be independent from those in the other layer. Traffic engineering solutions developed for either IP networks or WDM networks can be directly applied to each layer, respectively. At the present stage, an anticipated first step towards IP over WDM is to hook up IP router interfaces to optical add/drop multiplexer client add/drop ports. This forms an overlay network in which WDM serves as the server layer and IP behaves like the client layer. This overlay client-server network is a natural match to the notion of overlay traffic engineering. With integrated traffic engineering, optimization with respect to selected objectives is pursued coordinately across both the IP and WDM layers. It is made possible by mechanisms such as multi-protocol lambda switching that allows a unified control plane across both layers. With the emergence of more sophisticated hardware that integrates functionality of both IP and WDM at each network element, integrated traffic engineering can be performed more naturally and efficiently.","PeriodicalId":415720,"journal":{"name":"2000 Digest of the LEOS Summer Topical Meetings. Electronic-Enhanced Optics. Optical Sensing in Semiconductor Manufacturing. Electro-Optics in Space. Broadband Optical Networks (Cat. No.00TH8497)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123146610","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}