A wavelength-multiplexed light transmission module according to the present invention includes a plurality of lasers that respectively emit a plurality of laser beams having different wavelengths, a lens radially emitting the plurality of laser beams, a bandpass filter that has a transmission center wavelength which is shorter as an incident angle is larger, and a mirror for reflecting the plurality of laser beams, wherein the plurality of laser beams are incident to the bandpass filter such that the incident angle of a laser beam is larger as the laser beam has a shorter wavelength, whereby the plurality of laser beams are transmitted through the bandpass filter, and an inclination angle of the mirror with respect to the bandpass filter is provided such that the plurality of laser beams transmitted through the bandpass filter are reflected by the bandpass filter and the mirror to be multiplexed with one another.

An optical apparatus is provided for an optical transceiver. The optical apparatus includes an interposer, a glass lens chip bonded to the interposer, and a plurality of bottom-emitting vertical-cavity surface-emitting lasers (VCSELs) flip chipped to the interposer. Each of the bottom-emitting VCSELs is fabricated on a respective substrate, at least one bottom-emitting VCSEL is capable of emitting an optical signal having a wavelength of about 850 nm, and at least a portion of the respective substrate on which the at least one bottom-emitting VCSEL is fabricated is removed to permit the at least one bottom-emitting VCSEL to emit the optical signal having the wavelength of about 850 nm to the glass lens chip.

An apparatus includes a substrate transmissive of electromagnetic energy of at least a plurality of wavelengths, having a first end, a second end, a first major face, a second major face, at least one edge, a length, a width, and a thickness, at least a first output optic that outputs electromagnetic energy the substrate; and a first input optic oriented and positioned to provide electromagnetic energy into the substrate via at least one of the first or the second major face of the substrate. The first output optic is laterally spaced from the first input optic. A number of reflectors and optional absorbers may be positioned proximate the first major face and/or the second major face to structure electromagnetic energy and/or to translate such from the first input optic to the first output optic. The apparatus may be part of a spectrometer or other optical system.

A wavelength-multiplexed light transmission module according to the present invention includes a plurality of lasers that respectively emit a plurality of laser beams having different wavelengths, a lens radially emitting the plurality of laser beams, a bandpass filter that has a transmission center wavelength which is shorter as an incident angle is larger, and a mirror for reflecting the plurality of laser beams, wherein the plurality of laser beams are incident to the bandpass filter such that the incident angle of a laser beam is larger as the laser beam has a shorter wavelength, whereby the plurality of laser beams are transmitted through the bandpass filter, and an inclination angle of the mirror with respect to the bandpass filter is provided such that the plurality of laser beams transmitted through the bandpass filter are reflected by the bandpass filter and the mirror to be multiplexed with one another.

In an example embodiment, a method includes receiving a first combined optical signal at an edge filter. The method further includes redirecting, at the edge filter, a second combined optical signal toward a first zigzag demultiplexer; and passing a third combined optical signal through the edge filter toward a light redirector based on wavelength. The method further includes redirecting the third combined optical signal toward a second zigzag demultiplexer. The method may further includes separating, at the first zigzag demultiplexer, the second combined optical signal into a first optical signal on a first optical path and a second optical signal on a second optical path based on wavelength. The method further includes separating, at the second zigzag demultiplexer, the third combined optical signal into a third optical signal on a third optical path and a fourth optical signal on a fourth optical path based on wavelengths.

An ultra-small multi-channel optical module according to one embodiment of the present invention includes a base board, a glass substrate, a heat sink, optical elements, parallel light lenses, a first rectangular reflector, a glass cover, a second rectangular reflector, horizontal reflectors, and a light collecting lens.

An optical axis adjustment method for an integrated optical module includes: measuring output currents by changing a wavelength of a light beam incident on a package; detecting, with first and second light receiving elements, light beams resulted from demultiplexing the incident light beam with first and second filters; detecting center wavelengths of a first light beam and a second light beam based on a change in the output currents in response to a change in the wavelength of the incident light beam; comparing the center wavelengths of the first light beam and the second light beam with design transmission wavelengths of the first filter and the second filter, and defining respective differences as a first wavelength deviation and a second wavelength deviation; and adjusting a position of the optical demultiplexer to make a total sum of the first wavelength deviation and the second wavelength deviation small.

A module includes a substrate, a transmission member and a reflection member, wherein on the substrate, surface emitting elements which emit light having different wavelengths are arranged side by side in a predetermined direction, the transmission member has a first surface which is parallel to the substrate and a second surface which is opposite to the first surface, the reflection member has a third surface which is parallel to the second surface of the transmission member, the second surface of the transmission member is inclined in the predetermined direction relative to the first surface and faces the third surface of the reflection member with an air layer in between, on the second surface of the transmission member, optical filters are arranged linearly side by side and the plurality of optical filters.

An optical axis adjustment method for an integrated optical module includes: measuring output currents by changing a wavelength of a light beam incident on a package; detecting, with first and second light receiving elements, light beams resulted from demultiplexing the incident light beam with first and second filters; detecting center wavelengths of a first light beam and a second light beam based on a change in the output currents in response to a change in the wavelength of the incident light beam; comparing the center wavelengths of the first light beam and the second light beam with design transmission wavelengths of the first filter and the second filter, and defining respective differences as a first wavelength deviation and a second wavelength deviation; and adjusting a position of the optical demultiplexer to make a total sum of the first wavelength deviation and the second wavelength deviation small.

In an example embodiment, a method includes receiving a first combined optical signal at an edge filter. The method further includes redirecting, at the edge filter, a second combined optical signal toward a first zigzag demultiplexer; and passing a third combined optical signal through the edge filter toward a light redirector based on wavelength. The method further includes redirecting the third combined optical signal toward a second zigzag demultiplexer. The method may further includes separating, at the first zigzag demultiplexer, the second combined optical signal into a first optical signal on a first optical path and a second optical signal on a second optical path based on wavelength. The method further includes separating, at the second zigzag demultiplexer, the third combined optical signal into a third optical signal on a third optical path and a fourth optical signal on a fourth optical path based on wavelengths.