Title: One-chip double core or multiple core semiconductor laser gas sensor and its making and using method
Application Number: 200610117006 Application Date: 2006.10.11
Publication Number: 1945284 Publication Date: 2007.04.11
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G01N21/25;H01S5/00
Applicant(s) Name: Shanghai Inst. of Microsystem and Information Tech Address:
Inventor(s) Name: Zhang Yonggang;Li Aizhen;Qi Ming;Feng Songlin
Attorney & Agent:
Abstract:
    The single substrate and double or multiple chip semiconductor laser gas sensor consists of laser, temperature controller circuit, time division drive circuit, photodetector for absorbing and reference light signal detection, amplifier and time division demodulator circuit, comparator circuit and display and output circuit in two or more chips on the same substrate and the same heat sink. The present invention measures gas concentration with the absorption laser capable of absorbing the target gas to generate laser in specific wavelength and the reference laser to produce the reference signal counteracting the effect of loss and fluctuation. The core of the semiconductor laser gas sensor is the semiconductor lasers and photodetector and the semiconductor laser gas sensor is universal.
Time: 9
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