Monolithic master oscillator power amplifier diode lasers

The properties of monolithic master oscillator power amplifier diode lasers are studied at FBH. The master oscillator (MO) consist of a ridge waveguide (RW) section that is wavelength stabilized by two passive  RW DBR gratings. The emission from the MO is then transmitted through an active control section and then intrinsically coupled to single pass tapered power amplifier. The control section is used to optimize and control the injection of the diffraction limited emission of the master oscillator into the power amplifier. The combination of the compact monolithic design, the higher degree of control due to the control section and the single pass scheme for the power amplifier give these devices the potential to increase the number of applications for wavelength stabilized Watt-class diode lasers with good beam quality.

  • Schematics for monolithic MOPA
    [+] Schematics for monolithic master oscillator power amplifier
  • Conduction cooled package for mounting of devices such as high-power MOPA
    [+] Conduction cooled package for mounting of devices such as high-power monolithic master oscillator power amplifiers

Working principle

The laser cavity of the master oscillator is defined by the two higher order distributed Bragg reflection gratings. The emission of the master oscillator is guided through the control section into the power amplifier, where it is amplified in a single pass scheme. The control section is used to control the output power and to optimize the injection in the power amplifier.

Current applications

  • Pumping of laser systems

Typical wavelengths

  • 1064 nm

Technology and mounting

  • Diode lasers with vertical layer structures realized by MOVPE
  • Anti-reflection coating of laser facets
  • Mounting and characterization of electro-optical, spectral and special properties

Funding is provided by EU for the H2020 project MIB (duration 01.01.2016 - 31.12.2020).