This invention proposes to engineer the current density along the length of a laser diode to overcome the penalty associated with non-uniformity resulting from asymmetry in the gain, photon or carrier density despite having uniform contact. Optimizing the current density profile enables diode lasers to operate with greater power conversion efficiency or operate with equivalent power conversion…
Keywords
- Show all (69)
- Synthesis and Processing (17)
- Materials for Energy Products (6)
- Compact Space Telescopes (5)
- Laser Materials Processing (5)
- Additive Manufacturing (4)
- Material Design (4)
- Optical Damage Mitigation (3)
- Precision Optical Finishing (3)
- RF Photonics (3)
- Ultrashort Pulse Lasers (3)
- 3D Printing (2)
- Membranes (2)
- Rare Earth Elements (REEs) (2)
- Additively Manufactured (AM) Optics (1)
- Magnet Compositions (1)
- Manufacturing Simulation (1)
- Material Characterization (1)
- Precision Engineering (1)
- Structural Materials (1)
- (-) Diode Lasers (4)
This invention proposes to engineer the temperature dependence of the emission wavelength of LEDs and laser diodes. The approach is to use a strain-inducing coating to counteract the intrinsic temperature coefficient of the emission wavelength of the LED or laser diode device thereby rendering it athermal. This invention avoids additional complexity, size, weight and power dissipation of…
This invention proposes a method to overcome the key limitation of electrically pumped lasers based on AlN, AlGaN, or AlInGaN, namely the lack of suitable shallow donor and acceptor dopants. As the band gap of these materials increases (and the emission wavelength decreases), both electrons and holes require greater thermal energies in order to ionize.
Laser diode lensing effect can be substantially reduced by creating a pattern interface such that the substrate is only attached at the diode mesa. This is achieved by either creating a pattern solder joint and/or pattern substrate.
Dubbed the "LLNL Chemical Prism", the LLNL system has use wherever there is a need to separate components of a fluid. A few examples include:
- Chemical detection for known and previously unknown chemicals or substances
- Separation of biomolecules from a cellular extract
- Fractionation of a complex mixture of hydrocarbons
- Forensic analysis of…