Optical receiver module and optical module
View Patent ↗An optical receiver module includes a light receiving element that has a first electrode and a second electrode for receiving a bias and converts an optical signal inputted into an electrical signal to output the electrical signal via the first electrode. A signal line extends from the first electrode through the light receiving element-side signal pad and the second wire to the amplifier-side signal pad. A bias line extends from the second electrode through the light receiving element-side bias pad, the first wire, and the third wire to the first and second amplifier-side bias pads. The signal line three-dimensionally intersects with the bias line at an interval in a direction of the loop height of the first wire and that of the second wire.
1. An optical receiver module, comprising:
a light receiving element having a first electrode and a second electrode for receiving a bias, the light receiving element for converting an optical signal inputted into an electrical signal to output the electrical signal via the first electrode;
a light receiving element-side signal pad electrically connected to the first electrode of the light receiving element;
a light receiving element-side bias pad electrically connected to the second electrode of the light receiving element;
an amplifier for supplying a voltage to apply the bias to the light receiving element and amplifying the electrical signal inputted from the light receiving element;
a first amplifier-side bias pad and a second amplifier-side bias pad where the voltage appears;
an amplifier-side signal pad for inputting the electrical signal to the amplifier;
a first wire connecting the light receiving element-side bias pad and the first amplifier-side bias pad through wire bonding;
a second wire connecting the light receiving element-side signal pad and the amplifier-side signal pad through wire bonding;
a third wire connecting the light receiving element-side bias pad and the second amplifier-side bias pad through wire bonding;
wherein a signal line is formed to extend from the first electrode through the light receiving element-side signal pad and the second wire to the amplifier-side signal pad,
wherein a bias line is formed to extend from the second electrode through the light receiving element-side bias pad, the first wire, and the third wire to the first amplifier-side bias pad and the second amplifier-side bias pad,
wherein the first wire three-dimensionally intersects with the second wire at an interval in a direction of a loop height of the first wire and the second wire,
wherein the amplifier-side signal pad is positioned between the first amplifier-side bias pad and the second amplifier-side bias pad,
wherein the light receiving element-side bias pad is positioned closer to, and adjacent to, the second amplifier-side bias pad than the first amplifier-side bias pad, and
wherein the third wire three-dimensionally intersects with neither the first wire nor the second wire in the direction of the loop height.
2. The optical receiver module according to claim 1 ,
wherein the light receiving element-side bias pad, the light receiving element-side signal pad, the first amplifier-side bias pad, the second amplifier-side bias pad, and the amplifier-side signal pad have respective bonding surfaces for bonding to the first wire or the second wire and the third wire, and
wherein the bonding surfaces all face in a same direction.
3. The optical receiver module according to claim 2 , wherein the direction in which the bonding surface faces coincides with the direction of the loop height.
4. The optical receiver module according to claim 1 , further comprising:
a carrier for supporting the light receiving element,
wherein the carrier has a wiring pattern electrically connected to the light receiving element, and
wherein the wiring pattern includes the light receiving element-side bias pad and the light receiving element-side signal pad.
5. The optical receiver module according to claim 4 ,
wherein the carrier has a first surface facing in a first direction and a second surface facing in a second direction, different from the first surface, and
wherein the wiring pattern extends from the first surface to the second surface, and includes the light receiving element-side bias pad and the light receiving element-side signal pad both mounted on the first surface, and an electrical connection portion mounted on the second surface, for electrical connection to the light receiving element.
6. The optical receiver module according to claim 1 , wherein the light receiving element-side bias pad and the light receiving element-side signal pad are mounted directly on the light receiving element.
7. An optical module, comprising:
a receiver optical sub-assembly having an optical receiver module including:
a light receiving element having a first electrode and a second electrode for receiving a bias, the light receiving element for converting an optical signal inputted into an electrical signal to output the electrical signal via the first electrode,
a light receiving element-side signal pad electrically connected to the first electrode of the light receiving element,
a light receiving element-side bias pad electrically connected to the second electrode of the light receiving element,
an amplifier for supplying a voltage to apply the bias to the light receiving element and amplifying the electrical signal inputted from the light receiving element;
a first amplifier-side bias pad and a second amplifier-side bias pad where the voltage appears,
an amplifier-side signal pad for inputting the electrical signal to the amplifier;
a first wire connecting the light receiving element-side bias pad and the first amplifier-side bias pad through wire bonding,
a second wire connecting the light receiving element-side signal pad and the amplifier-side signal pad through wire bonding, and
a third wire connecting the light receiving element-side bias pad and the second amplifier-side bias pad through wire bonding; and
a transmitter optical sub-assembly for converting an electrical signal inputted into an optical signal to output the optical signal,
wherein a signal line is formed to extend from the first electrode through the light receiving element-side signal pad and the second wire to the amplifier-side signal pad,
wherein a bias line is formed to extend from the second electrode through the light receiving element-side bias pad, the first wire, and the third wire to the first amplifier-side bias pad and the second amplifier-side bias pad,
wherein the first wire three-dimensionally intersects with the bias line at an interval in a direction of a loop height of the first wire and the second wire,
wherein the amplifier-side signal pad is positioned between the first amplifier-side bias pad and the second amplifier-side bias pad,
wherein the light receiving element-side bias pad is positioned closer to, and adjacent to, the second amplifier-side bias pad than the first amplifier-side bias pad, and
wherein the third wire three-dimensionally intersects with neither the first wire nor the second wire in the direction of the loop height.