Optical module with double emitter chips and double dove prisms

An optical assembly, comprising:

• a coupling fast axis collimator (CFAC) and a coupling slow axis collimator (CSAC) arranged to couple multiple laser beams into an optical fiber;
• and
• an array that includes multiple optical devices arranged in one or more rows, wherein the multiple optical devices each include:
• a diode laser that includes a first emitter configured to emit a first laser beam in a beam propagation direction and a second emitter configured to emit a second laser beam in the beam propagation direction;
• a fast axis collimator (FAC) arranged to collimate the first laser beam and the second laser beam in a vertical direction relative to the beam propagation direction;
• a slow axis collimator (SAC) arranged after the FAC to collimate the first laser beam and the second laser beam in a horizontal direction relative to the beam propagation direction;
• a first Dove prism arranged between the FAC and the SAC;
• a second Dove prism arranged between the FAC and the SAC;
• and
• a mirror, arranged after the SAC, to direct the first laser beam and the second laser beam toward the CFAC and the CSAC,
• wherein the first Dove prism and the second Dove prism include respective axes that are rotated relative to the first emitter and the second emitter such that the first laser beam and the second laser beam swap fast and slow axes and are stacked in a fast axis direction after passing through the first Dove prism and the second Dove prism.

A method, comprising:

• emitting, by a first emitter of a diode laser, a first laser beam;
• emitting, by a second emitter of the diode laser, a second laser beam;
• collimating, by a fast axis collimator (FAC), the first laser beam and the second laser beam in a vertical direction relative to a beam propagation direction;
• rotating, by a first Dove prism, the first laser beam by ninety (90) degrees after the first laser beam passes through the FAC;
• rotating, by a second Dove prism, the second laser beam by ninety (90) degrees after the second laser beam passes through the FAC;
• and
• collimating, by a slow axis collimator (SAC), the first laser beam and the second laser beam in the vertical direction relative to the beam propagation direction after the first laser beam and the second laser beam are rotated by the first Dove prism and the second Dove prism.