An optical sub-assembly, OSA, comprising: a barrel defining a port; an optoelectronic transducer (122,422) including a transmitter or a receiver, the optoelectronic transducer (122,422) at least partially positioned within the barrel; an optical fiber at least partially positioned within the port; and an optical device including: a body at least a portion of which is formed from a material that is transmissible to light, the body configured to be positioned in the optical sub-assembly between the optoelectronic transducer (122, 422) and the port, wherein the optoelectronic transducer (122, 422) and the optical fiber collectively define an axis extending between a point on an optically active portion of the optoelectronic transducer (122, 422) and a point on a surface of the optical fiber, the body being configured to be positioned along the axis; characterized by: a first surface of the body configured to be offset by a first angle (α) relative to a plane (203, 205) that is perpendicular to the axis; the first surface configured to direct an optical signal along a path that diverges from the axis; and a second surface of the body configured to be offset by a second angle (β) from the plane (203, 205), the second angle (β) being different from the first angle (α), wherein the first surface and the second surface are positioned at respective opposing ends of the body, the second surface configured to direct the optical signal along a path that converges with the axis at: a face of the optical fiber when the optoelectronic transducer includes the transmitter; or the receiver when the optoelectronic transducer includes the receiver. a barrel defining a port; an optoelectronic transducer (122,422) including a transmitter or a receiver, the optoelectronic transducer (122,422) at least partially positioned within the barrel; an optical fiber at least partially positioned within the port; and an optical device including: a body at least a portion of which is formed from a material that is transmissible to light, the body configured to be positioned in the optical sub-assembly between the optoelectronic transducer (122, 422) and the port, wherein the optoelectronic transducer (122, 422) and the optical fiber collectively define an axis extending between a point on an optically active portion of the optoelectronic transducer (122, 422) and a point on a surface of the optical fiber, the body being configured to be positioned along the axis; characterized by: a first surface of the body configured to be offset by a first angle (α) relative to a plane (203, 205) that is perpendicular to the axis; the first surface configured to direct an optical signal along a path that diverges from the axis; and a second surface of the body configured to be offset by a second angle (β) from the plane (203, 205), the second angle (β) being different from the first angle (α), wherein the first surface and the second surface are positioned at respective opposing ends of the body, the second surface configured to direct the optical signal along a path that converges with the axis at: a face of the optical fiber when the optoelectronic transducer includes the transmitter; or the receiver when the optoelectronic transducer includes the receiver. a body at least a portion of which is formed from a material that is transmissible to light, the body configured to be positioned in the optical sub-assembly between the optoelectronic transducer (122, 422) and the port, wherein the optoelectronic transducer (122, 422) and the optical fiber collectively define an axis extending between a point on an optically active portion of the optoelectronic transducer (122, 422) and a point on a surface of the optical fiber, the body being configured to be positioned along the axis; characterized by: a first surface of the body configured to be offset by a first angle (α) relative to a plane (203, 205) that is perpendicular to the axis; the first surface configured to direct an optical signal along a path that diverges from the axis; and a second surface of the body configured to be offset by a second angle (β) from the plane (203, 205), the second angle (β) being different from the first angle (α), wherein the first surface and the second surface are positioned at respective opposing ends of the body, the second surface configured to direct the optical signal along a path that converges with the axis at: a face of the optical fiber when the optoelectronic transducer includes the transmitter; or the receiver when the optoelectronic transducer includes the receiver. a first surface of the body configured to be offset by a first angle (α) relative to a plane (203, 205) that is perpendicular to the axis; the first surface configured to direct an optical signal along a path that diverges from the axis; and a second surface of the body configured to be offset by a second angle (β) from the plane (203, 205), the second angle (β) being different from the first angle (α), wherein the first surface and the second surface are positioned at respective opposing ends of the body, the second surface configured to direct the optical signal along a path that converges with the axis at: a face of the optical fiber when the optoelectronic transducer includes the transmitter; or the receiver when the optoelectronic transducer includes the receiver. a face of the optical fiber when the optoelectronic transducer includes the transmitter; or the receiver when the optoelectronic transducer includes the receiver.