Laser diode sensor

Details Laser diode sensor Laser diode sensor

1995-04-21

1997-01-07

Snay, Jeffrey

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing liquid or solid sample

422 8208, 422 8211, 356318, G01N 2163

Patent

active

055914071

ABSTRACT:
A chemical sensor uses a semiconductor diode laser having a surface active region. A laser structure, including an active layer, a cladding layer, a barrier layer and a grating layer, is constructed on a substrate. A contact layer is deposited on a surface of the laser structure. One or more electrodes are positioned on the contact layer. A segmented electrode has a first contact pad, a second contact pad, and a surface active region between the first and second pads. A surface active region is created between the two electrodes. The tail of the lasing signal interacts with surface features of the diode laser or with chemical materials or probes in contact with the surface of the diode laser or in contact with coatings on the surface of the diode laser. Chemical changes in the ambient environment induce changes in the laser signal. The modified laser signal output is detected by a detector region integral with or separated from the laser structure. The laser diode sensor has applications in fields involving chemical sensing and identification, including automotive, environmental and medical fields.

REFERENCES:
patent: 4169676 (1979-10-01), Kaiser
patent: 4819036 (1989-04-01), Kuroda
patent: 4844613 (1989-07-01), Batchelder et al.
patent: 4880752 (1989-11-01), Keck et al.
patent: 4894833 (1990-01-01), Carlin
patent: 5047213 (1991-09-01), Finlan et al.
patent: 5107316 (1992-04-01), Jelly
patent: 5109386 (1992-04-01), Bradley
patent: 5132097 (1992-07-01), Van Deusen et al.
patent: 5194393 (1993-03-01), Hugl et al.
patent: 5208878 (1993-05-01), Thulke
patent: 5212099 (1993-05-01), Marcus
patent: 5268145 (1993-12-01), Namba et al.
patent: 5298428 (1994-03-01), O'Rourke et al.
patent: 5298741 (1994-03-01), Walt et al.
patent: 5299141 (1994-03-01), Hungerford et al.
patent: 5308771 (1994-05-01), Zhou et al.
patent: 5315673 (1994-05-01), Stetter
patent: 5317897 (1994-06-01), Jelly
Dai et al. Can. J. Phys. 70, 921 (1992).
Hunziker (AN 1995:138017) Abstract Only.
Hamao (AN 1993:263473) HCA Plus.
Tsang (AN 1995:77003) HCA Plus.
Wu et al., "Large Wavelength Shifts in Thin p-clad InGaAs QW Lasers", 3-page paper presented at IEEE/LEOS Annual Mtg Boston, MA (Nov. 1994).

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