System and method for measuring stimuli using vcsel

OPT OpenIR > 半导体激光器专利数据库

	System and method for measuring stimuli using vcsel
其他题名	System and method for measuring stimuli using vcsel
	KOCHERGIN, VLADIMIR,LAKE SHORE CRYOTRONICS, INC.; SWINEHART, PHILIP R.,LAKE SHORE CRYOTRONICS, INC.
	2008-03-12
专利权人	LAKE SHORE CRYOTRONICS, INC.
公开日期	2008-03-12
授权国家	欧洲专利局
专利类型	发明申请
摘要	An optical sensor diagnostic system utilizing a tunable Vertical Cavity Surface Emitting Laser (VCSEL) (31) that incorporates an integrated MEMS tuning mechanism provides variable wavelengh light into an optical fiber with improved wavelength scanning speed and greater simplicity of construction. Sensors, such as Bragg gratings, are disposed along the fiber in the light path. Each sensor reflects or transmits light exhibiting a characteristic amplitude feature with respect to wavelength, the wavelength position of which is affected by an environmental stimulus imposed thereon. The power of the reflected light is converted to an electrical signal by a simple detector and monitored by circuitry that detects changes in reflected power and provides output signals indicative of the environmental stimulus for each sensor.
其他摘要	利用可调谐垂直腔面发射激光器（VCSEL）（31）的光学传感器诊断系统结合了集成的MEMS调谐机构，将可变波长光提供到光纤中，具有改进的波长扫描速度和更简单的结构。诸如布拉格光栅的传感器沿光纤布置在光路中。每个传感器反射或透射表现出相对于波长的特征振幅特征的光，其波长位置受到施加在其上的环境刺激的影响。反射光的功率通过简单的检测器转换为电信号，并由检测反射功率变化的电路监控，并提供指示每个传感器的环境刺激的输出信号。
主权项	An optical sensor diagnostic system, comprising: a tunable VCSEL incorporating an integrated MEMS wavelength tuner for providing wavelength-tunable light in response to a tuning control signal, said tunable light being launched into an optical waveguide, said tunable VCSEL including a movable tuning mirror and a capacitive or optical detector for detecting the position of the movable tuning mirror and providing feedback; at least one optical sensor, disposed in the path of said tunable light, said at least one sensor providing a transmitted light having at least one associated characteristic amplitude feature selected from the group consisting of a minimum, a maximum or a slope located at a particular wavelength within the transmitted wavelength range, said wavelength at each minimum, maximum or sloped transmission amplitude being responsive to an environmental stimulus imposed upon said at least one sensor; said tunable VCSEL individually illuminating said at least one sensor in a wavelength range spanning said wavelength location of said associated characteristic transmission amplitude feature; an optical isolator, disposed in the path of said tunable light between said tunable VCSEL and said at least one sensor, for isolating said tunable light source from light reflected from said at least one sensor; an optical detector, disposed in the path of said transmitted light, for detecting said transmitted light from said at least one sensor and for providing an electrical detection signal indicative of the power of said transmitted light throughout a predetermined wavelength range; a controller for providing a variable tuning control signal to said tunable VCSEL indicative of the desired wavelength of said tunable light; at least one wavelength reference independent of said tuning control signal and moveable mirror position detector disposed in the path of the light; and a signal processor responsive to said electrical detection signal, for detecting a wavelength defined on the characteristic transmission amplitude feature in order to quantitatively detect the effect on said at least one sensor due to said environmental stimulus, changes in said wavelength at the characteristic transmission amplitude feature caused by changes in said environmental stimulus, and for providing a signal indicative of said stimulus or change therein.
申请日期	2002-10-23
专利号	EP1444758A4
专利状态	失效
申请号	EP2002797051
公开（公告）号	EP1444758A4
IPC 分类号	G01N21/27 \| G01B9/02 \| G01N21/39 \| G01N21/45 \| G01N21/55 \| G01N21/64 \| G01N21/77 \| G02B6/34 \| G02B6/42 \| G02B26/00 \| G02B27/28 \| H01S5/06 \| H01S5/183 \| H01S3/10 \| G02B6/12 \| H01S3/13 \| H01S5/00
专利代理人	-
代理机构	FLACH, DIETER DIPL.-PHYS.
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/66494
专题	半导体激光器专利数据库
作者单位	LAKE SHORE CRYOTRONICS, INC.
推荐引用方式 GB/T 7714	KOCHERGIN, VLADIMIR,LAKE SHORE CRYOTRONICS, INC.,SWINEHART, PHILIP R.,LAKE SHORE CRYOTRONICS, INC.. System and method for measuring stimuli using vcsel. EP1444758A4[P]. 2008-03-12.