PROBLEM TO BE SOLVED: To provide a multiwavelength laser device for photodynamic diagnosis/therapy, allowing efficient PDT (Photodynamic Therapy) and PDD (Photodynamic Diagnosis), and allowing confirmation of a tumor tissue in the PDT and high-accuracy detection of red fluorescence using a photodetector.SOLUTION: This multiwavelength laser device for photodynamic diagnosis/therapy includes: a pulse laser light source 1 including laser oscillators 11, 12 capable of emitting laser light L1 having a peak wavelength of 395-415 nm and laser light L2 having a peak wavelength of 625-645 nm, and a pulse generator 14 pulsing the laser light L1, L2 a light guide optical system 2 leading the plurality of pieces of laser light L1, L2 to one part and optical fiber cable 3 capable of irradiating an object with the laser light L1, L2. The pulse generator 14 of the pulse laser light source 1 includes a pulse control function of controlling pulse waveforms of the laser light L1 and the laser light L2 such that the laser light L1 having the peak wavelength of 395-415 nm and the laser light L2 having the peak wavelength of 625-645 nm are not simultaneously emitted, to stagger blinking timing.COPYRIGHT: (C)2013,JPO&INPIT【課題】 PDT及びPDDを効率的に行うことができ、しかも、PDT中における腫瘍組織の確認および光検出器を用いた赤色蛍光の高精度な検出も可能な光線力学診断・治療用の多波長レーザ装置を提供すること。【解決手段】 ピーク波長が395~415nmのレーザ光L1と625~645nmのレーザ光L2を出射可能なレーザ発振器11・12、及びこれらのレーザ光L1・L2をパルス化するためのパルス発生器14を備えたパルスレーザ光源1と;複数のレーザ光L1・L2を一箇所に導く導光光学系2と;対象物に前記レーザ光L1・L2を照射可能な光ファイバケーブル3とを含んで構成し、更に、前記パルスレーザ光源1のパルス発生器14には、ピーク波長が395~415nmのレーザ光L1と、ピーク波長が625~645nmのレーザ光L2とが同時に照射されないように両者のパルス波形を制御して点滅タイミングをずらすパルス制御機能を備えた。【選択図】 図1
