| 摘要 |
<p>#CMT# #/CMT# The structure (1) has a beam shaping element (14) e.g. microlens or gradient-index lens, collimating laser beam (7) from a laser aperture (8) of a laser diode chip (6) before passing through a window (5) of a housing (2). The window is arranged opposite to a middle axis of the beam in an inclined manner such that reflections of the beam miss the aperture, where the reflections occur at the window. The beam shaping element comprises a deep physical contact with the chip, has constant temperature state against the diode chip and is connected with the chip in an abutting manner. #CMT# : #/CMT# An independent claim is also included for a method for optical gas detection. #CMT#USE : #/CMT# Laser diode structure for optical gas detection. #CMT#ADVANTAGE : #/CMT# The beam shaping element comprises the deep physical contact with the laser diode chip, has constant temperature state against the diode chip and is connected with the laser diode chip in an abutting manner, thus improving sensitivity of the gas sensor, and clearly reducing interference occurrences of the laser beam during discharge of the laser beam from the closed hermetically sealed housing of the laser diode structure. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic sectional view of a laser diode structure with a ball-shaped microlens and a window running towards the bottom of a housing. 1 : Laser diode structure 2 : Housing 5 : Window 6 : Laser diode chip 7 : Laser beam 8 : Laser aperture 14 : Beam shaping element.</p> |
