Monolithic-integrated two-wavelength laser diodes for digital-versatile-disk/compact-disk playback

Nemoto, Kiyomitsu; Kamei, T.; Abe, Hiroaki; Imanishi, Daisuke; Narui, Hironobu; Hirata, Shinnosuke

doi:10.1063/1.1360231

Cited by 13 publications

(4 citation statements)

References 6 publications

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“…As a technique for obtaining two or more emissions of semiconductor lasers having different peak wavelengths from each other, a GaAs-based dual-wavelength laser for CD / DVD is known. [9] In this case, it is 785 nm for CD and 660 nm for DVD. This forms an infrared laser for CD and a red laser diode for DVD laser diode on the same substrate on an n-type GaAs substrate.…”

Section: Multi-wavelength Chipmentioning

confidence: 94%

22.1: Invited Paper: Single mode Red, Green and Blue Laser Diodes and their Applications for HMD, AR/VR Glasses

Hirano¹,

Tani²,

Ono³

et al. 2022

Symp Digest of Tech Papers

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In recent years, Laser Diodes have been used in various applications. The first real application started with the release of compact disc(CD) players/digital versatile disks (DVD) players. Since blue and green lasers have been developed, and laser diodes have begun to be used for various display applications such as pico‐projector and Laser TV. In particular, recently, it is expected to be applied to head mount display(HMD) and Augmented reality(AR)/virtual reality(VR) glass applications as one of the new applications of single mode laser. This paper shows the laser diode and applications that have been developed so far, the trends of light sources for HMD and AR/VR glass applications that are expected in the future, the issues when using red green and blue laser diodes, and how to solve them.

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Section: Multi-wavelength Chipmentioning

confidence: 94%

22.1: Invited Paper: Single mode Red, Green and Blue Laser Diodes and their Applications for HMD, AR/VR Glasses

Hirano¹,

Tani²,

Ono³

et al. 2022

Symp Digest of Tech Papers

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“…GaAs-based dual-wavelength laser for compact disc (CD) and digital versatile disc (DVD) is known as a technique for obtaining two or more light emissions with different peak wavelengths from a laser diode. [7] 785 nm is for CD and 660 nm is for DVD. This involves forming an infrared (for CD) laser section and a red (for DVD) laser section on the same n-type GaAs substrate.…”

Section: Figure 6 Speckle Noise Reduction Technology and Simulation R...mentioning

confidence: 99%

28.1: Invited Paper: A Review of Optical source by using μLED and Single mode Laser Diodes for HMD, AR/VR Glasses

Hirano¹,

Tani²,

Miyamoto³

et al. 2023

Symp Digest of Tech Papers

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Expansion of devices to access the virtual world is expected due to much attention to Metaverse in recent years. In particular, head mount display (HMD), smart glasses and AR glasses have been attracting attention as next‐generation mobile devices that will replace smart phones. Laser diodes and μLEDs are developed in various research institutes and companies as light sources for those devices. In this paper, we describe the development status of the laser diodes and the μLEDs, the technical problems of optimal adaptation to smart glasses, and introduce one of the solutions when using the laser diodes.

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“…It is necessary to confine the interval of two emitting points of LD chips within 110 AE 3 mm. To this end, there are two approaches: one is to fabricate two different active layers on one chip (a monolithic-integrated solution), 1) the other is to place two different LD chips side-by-side on one substrate (a hybrid-integrated solution). 2) However, none of these approaches has thus far been successfully applied to mass production.…”

Section: Introductionmentioning

confidence: 99%

Dual-Wavelength High-Power Laser Diodes Fabricated by Selective Fluidic Self-Assembly

Tojo

Yamanaka

Singh

et al. 2005

Jpn. J. Appl. Phys.

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We have developed dual-wavelength high-power laser diodes (LDs) with a hybrid integrated solution, in which a 660 nm (red) LD chip and a 780 nm (infrared) LD chip are mounted side-by-side on the same substrate. To achieve the required mounting position accuracy, i.e., the distance between two emitting points is limited to 110±3 µm, we have developed a novel mounting technique called selective fluidic self-assembly (S-FSA). In this technique, we used new self-locking structures of guest-host pairs. Bumps formed on the bonding surfaces of the LD chips are used as guests. A substrate with recesses whose shapes correspond to those of the bumps is used as the host. By forming bumps aligned along the waveguide and assigning a rotationally asymmetric shape for the bumps, an accurate and selective mounting is realized. Dual-wavelength LDs fabricated by this technique demonstrated the required positioning accuracy and high-power operation.

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Monolithic-integrated two-wavelength laser diodes for digital-versatile-disk/compact-disk playback

Cited by 13 publications

References 6 publications

22.1: Invited Paper: Single mode Red, Green and Blue Laser Diodes and their Applications for HMD, AR/VR Glasses

22.1: Invited Paper: Single mode Red, Green and Blue Laser Diodes and their Applications for HMD, AR/VR Glasses

28.1: Invited Paper: A Review of Optical source by using μLED and Single mode Laser Diodes for HMD, AR/VR Glasses

Dual-Wavelength High-Power Laser Diodes Fabricated by Selective Fluidic Self-Assembly

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