成果報告書詳細
管理番号20100000001917
タイトル*平成20年度中間年報 エネルギー使用合理化技術戦略的開発/エネルギー有効利用基盤技術先導研究開発/省エネルギーレーザ加工のための高効率ファイバ結合型レーザ光源の研究開発
公開日2010/11/10
報告書年度2008 - 2008
委託先名三菱電機株式会社 株式会社フジクラ
プロジェクト番号P03033
部署名省エネルギー技術開発部
和文要約和文要約等以下本編抜粋:1.研究開発の内容及び成果等 (1)研究目的と実施計画 本研究開発では、産業において今後大きな割合を占めると予測される加工用レーザの省エネルギー化を目的として、高効率・高出力・高品質のファイバ結合LD光源を開発し、これを励起源とするファイバレーザを試作する。このために、「(1)高密度ファイバ結合型LD光源の開発」、「(2)高出力ファイバレーザの開発」を実施し、高効率であるとともに、幅広い応用分野に適用可能なビーム品質と信頼性を備えたファイバ結合型レーザ光源の要素技術を開発する。
英文要約Title: Strategic Development of Energy Conservation Technology Project / Preparatory Research Phase (Fundamental Technology Development for Energy Conservation) / Research & Development of Efficient Fiber Coupled Laser Sources for Energy Saving Laser Processing (FY2008-FY2009) FY2008 Annual Report
We carried out 3 research items for the development of efficient fiber coupled laser sources for energy saving laser processing. Consequently, we made a progress in each item to achieve interim marks in fiscal year 2009. (1)Development of High-Intensity Fiber Coupled Laser Diode: (a) Development of Efficient Laser Diode Chip: By adopting InGaAs quantum well as active layer, we made a prototype of LD chip emitting at 900nm wavelength range with low threshold current. We found that the operating voltage depend on band-gap energy of the guide layer by numerical simulation and experiment. It suggests that efficiency could be improved by controlling band-gap energy of the guide layer. (b) Development of High-Intensity Fiber Coupled LD-Package: We made a prototype of high-power LD package of output power of 60W by optimizing soldering process. Considering the specifications of high-power LD, we designed micro-optics to put the output beam into Φ400μm optical fiber. Utilizing newly obtained assembling technique to set the micro-optics precisely, we attained a fiber coupled LD package of output power of 50W. (2)Development of High-Power Fiber Laser: (a) Development of High-Power Fiber Components: Basic design of the pump combiner for high power fiber lasers has been completed. We adopted a unique structure of the pump combiner. We confirmed that the combiner is durable to the optical input power of up to 250 watts. Also the optical power durability of the fiber Bragg grating was investigated. By improving the fiber cleaning technique the heat generation at the FBG was successfully suppressed so that the power durability of the FBG was confirmed up to 250 watts. Durability of these fiber components to a higher optical input will be investigated. (3) Evaluation of Fiber Coupled Laser Sources (a) Parametric Study of a High-Power Diode and Fiber lasers: We have installed equipments for evaluating high-power diode and fiber lasers. Equipments include high-brightness laser diode, double-clad active fiber and measurement instruments such as optical spectrum analyzer. We also installed air conditioning system including a compact clean unit for high power lasers. Utilizing the equipment, we evaluated physical parameters of sample diode and fiber laser. (b) Design Issues of High-Power Pulse Fiber Lasers: We present the production of intense pulses by combining a pico-second master laser (4.5ps, 150MHz) with a large mode-area (Φ30μm) fiber amplifier. The output power reached up to 11 W, corresponding to peak power of ~16kW. At this stage, we have not observed any significant pulse broadening effects due to nonlinear effects in the fiber amplifier.
ダウンロード成果報告書データベース(ユーザ登録必須)から、ダウンロードしてください。

▲トップに戻る