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Tecnología para desarrollar revestimientos ópticos reflectantes y antirreflectantes en láseres semiconductores Fabry-Perot

Resumen

Tipo:
Demanda Tecnológica
Referencia:
11 RU 86FG 3ND4
Publicado:
23/06/2015
Caducidad:
30/12/2015
Resumen:
Una empresa rusa especializada en el diseño y fabricación de láseres semiconductores de alta potencia busca una tecnología para desarrollar revestimientos ópticos reflectantes y antirreflectantes en superficies de láseres semiconductores Fabry-Perot basados en heteroestructuras AlGaAs/GaAs. La empresa prefiere una tecnología totalmente desarrollada o cercana a la situación de producción a gran escala. Se buscan socios interesados en establecer acuerdos de licencia o completar el desarrollo en el marco de un programa internacional.

Details

Tittle:
Technology for making optically strong reflecting and antireflecting coatings at semiconductor Fabry-Perot lasers
Summary:
A small company from St. Petersburg specialized in design and production of high-power semiconductor lasers is interested in a technology for making optically strong reflecting and antireflecting coatings at cleavage surfaces of semiconductor Fabry-Perot lasers based on AlGaAs/GaAs heterostructures. The company would prefer a ready technology or close to mass production. The company is ready to sign a license agreement or finalize the technology jointly within international programs.
Description:
High-power semiconductor lasers have a wide range of practical applications: pumping of solid and fiber lasers, technological treatment of materials, medical equipment. The main requirement is ensuring the maximum emitted power and reliability. The research showed that the main factor that limits reaching the maximum power and reliability for the semiconductor lasers based on AlGaAs/GaAs heterostructures is the optical strength of reflecting and antireflecting coatings. This is caused by to the fact that, when a resonator mirror is formed by cleaving at open air (which is the simplest method), the surface of Al-containing solid solutions oxidizes actively, and as a result, centers of nonradiative recombination appear. Absorption of laser emission by these centers leads to heating of the surface up to the melting point and, as a result, the mirror is damaged. Technologies of forming protective coatings without centers of nonradiative recombination (cleaving in vacuum or cleaning of the oxidized surface) do not ensure a long-term reliability, because oxidation takes place during the laser operation. That is why formation of passivation layer is required.
The company seeks partners possessing a technology of forming reflecting and antireflecting coating at the resonator mirrors of semiconductor lasers that would ensure an increased threshold of optical mirror damage, as well as long-term reliability of coating, or having experience of developing of similar technologies.
Technical Specification or Expertise Sought:
The company needs a technology of reflecting (R>95%) and anti-reflecting (R=0.1-5%) coatings for cleaved semiconductor Fabry-Perot lasers, produced on basis of AlGaAs/GaAs heterostructures and emitting in spectral range of 800-1100 nm. The technology should be repeatable in mass production and make use of available/affordable technological equipment.
Requirements at the temperature of the heatsink of 250C, emitting aperture of 100 mkm: maintaining the optical characteristics (lack of catastrophic optical mirror damage COMD) at the capacity emitted from the output mirror (R=0.1-5%)
- In a continuous mode:
not less than 20W (power density not less than 30MW/cm2) - 100 hours of operating time
not less than 10W - 50000 hours of operating time
- In an impulse mode:
200W (power density not less than 300MW/cm2) at the impulse length of 150ns and frequency of 10kHz - 50000 hours of operating time

Partner sought

Type and Role of Partner Sought:
- Type of partner sought: Research company, commercial company.

- Specific area of activity of the partner: Designing and production of high-power semiconductor lasers and optical coating for them.

- Task to be performed by the partner sought: Technology Transfer, Joint Development.
Type of Partnership Considered:
Joint Venture Agreement
Joint further development
License Agreement

Client

Type and Size of Client:
Industry SME 11-49
Already Engaged in Trans-National Cooperation:
No
Languages Spoken:
English