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High Power LD, LDA & LDS Speaker: Shiuan-Li Lin Advisor : Sheng-Lung Huang Solid-State Laser Crystal and Device Laboratory
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Page 2 Outline Semiconductor laser diode The working principle of laser diode High power laser diode (LD) High power laser diode array (LDA) High power laser diode stack (LDS) Conclusion Solid-State Laser Crystal and Device Laboratory
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Page 3 Semiconductor Laser Diode Solid-State Laser Crystal and Device Laboratory Laser diode is a laser whose active medium is a semiconductor similar light-emitting diode, which is formed from a p-n junction and powered by injected electric current Laser diodes are numerically the most common laser type and have many applications like laser printer, laser pointer, optical communication etc.
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Page 4 The working principle of laser diode Solid-State Laser Crystal and Device Laboratory Carrier generation and recombination in active regions Recombined carriers contribute to gain & photon emission
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Page 5 The working principle of laser diode Solid-State Laser Crystal and Device Laboratory Double heterostructure lasers Enhance most of the electron-hole pairs can contribute to amplification Quantum well lasers Enable laser action at relatively long wavelengths & be tuned VCSEL The optical cavity axis along the direction of current flow
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Page 6 The working principle of laser diode Solid-State Laser Crystal and Device Laboratory Material systems : laser diode can achieve a wide range of emission wavelength
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Page 7 High power laser diode Solid-State Laser Crystal and Device Laboratory
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Page 8 High power laser diode : narrow band Solid-State Laser Crystal and Device Laboratory RW laser 1. many Fabry-Perot modes exist 2. mutlimode DFB/DBR laser 1. integrated grating structure acting as frequency filter 2. purely singlemode
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Page 9 High power laser diode : narrow band Solid-State Laser Crystal and Device Laboratory Volume Bragg Grating (VBG) using the grating design to select the selected wavelength passing through
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Page 10 State of the art : single emitter of LD Solid-State Laser Crystal and Device Laboratory Coherent : 790-830 nm Single Emitter Devices
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Page 11 High power laser diode : LDA Solid-State Laser Crystal and Device Laboratory CCP
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Page 12 State of the art : single emitter of LDA Solid-State Laser Crystal and Device Laboratory Coherent : 780-830 nm CCP
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Page 13 State of the art : single emitter of LDA Solid-State Laser Crystal and Device Laboratory Coherent : PulseLife CW Horizontal Array
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Page 14 High power laser diode : LDS Solid-State Laser Crystal and Device Laboratory Laser diode stacks output power usually around 40W to 4500W, depend on the arrays or emitters‘ number LDS has many kinds of shape like G-stacks, diode laser bars or etc.
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Page 15 State of the art : single emitter of LDA Solid-State Laser Crystal and Device Laboratory JENOPDIK : Vertical Diode Laser Stacks
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Page 16 Conclution Solid-State Laser Crystal and Device Laboratory Semiconductor laser diode are numerically the most common laser type, with 2004 sales of approximately 733 million units High power laser diode has many application like laser cutting industry, optical pumping etc.
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Page 17 Solid-State Laser Crystal and Device Laboratory bee6565 Thanks for your listening!
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