Measuring device for lateral optical fiber lens and measuring method using same

A measurement method for measuring the light-emitting angle of a lateral optical fiber lens by a measuring device for a lateral optical fiber lens, comprising an XZ movable platform and an XY movable platform;

• wherein a rotatable accommodating pipe is arranged on the XZ movable platform, an optical detection card is arranged on the XY movable platform, and an optical power probe is arranged below the optical detection card;
• and a height of the optical detection card is smaller than that of the accommodating pipe;
• wherein the measurement method comprises the steps of:
• initializing the measuring device, wherein the initial position of the center of the fiber lens is A0 (0, 0, Z0);
• adjusting the XZ movable platform and/or the accommodating pipe to drive the fiber lens to move and/or rotate until the projection of the fiber lens on the optical detection card does not exceed the square identification region, and when the center of the light spot projection on the optical detection card is located at the center O of the square identification region, the adjustment of the XZ movable platform and/or accommodating pipe is stopped, and at this time the position of the fiber lens is A1 (X1, 0, Z1);
• and
• calculating the light-emitting angle (α) of the fiber lens, α=|arctan (X1/Z1)|.

A measurement method for measuring the divergence angle of a lateral optical fiber lens by a measuring device for a lateral optical fiber lens, comprising an XZ movable platform and an XY movable platform;

• wherein a rotatable accommodating pipe is arranged on the XZ movable platform, an optical detection card is arranged on the XY movable platform, and an optical power probe is arranged below the optical detection card;
• and a height of the optical detection card is smaller than that of the accommodating pipe;
• wherein the measurement method comprises the steps of:
• initializing the measuring device, wherein the initial position of the center of the fiber lens is A0 (0, 0, Z0);
• adjusting the XZ movable platform and/or the accommodating pipe to drive the fiber lens to move and/or rotate until the projection of the fiber lens on the optical detection card does not exceed the square identification region, and when the center of the light spot projection on the optical detection card is located at the center O of the square identification region, the adjustment of the XZ movable platform and/or accommodating pipe is stopped, and at this time the position of the fiber lens is A1 (X1, 0, Z1);
• adjusting the XY movable platform to drive the optical detection card to move along the first direction of the X axis, and observing the change of the indicated reading P of the optical power probe, when P reaches the maximum value P1, the coordinates of O at this time (X2, 0, 0) are recorded;
• adjusting the XY movable platform to drive the optical detection card to move along the second direction of the X axis, and observing the change of the indicated reading P of the optical power probe, when P reaches 0.5 P1, the coordinates of O at this time (X3, 0, 0) are recorded;
• initializing the measuring device;
• adjusting the XY movable platform to drive the optical detection card to move along the first direction of the Y axis, and observing the change of the indicated reading P of the optical power probe, when P reaches the maximum value P1, the coordinates of O at this time (0, Y2, 0) are recorded;
• adjusting the XY movable platform to drive the optical detection card to move along the second direction of the Y axis, and observing the change of the indicated reading P of the optical power probe, when P reaches 0.5 P1, the coordinates of O at this time (0, Y3, 0) are recorded;
• and
• calculating the divergence angle of the fiber lens:
• divergence angle (OX) β≈2×arctan [(δx×cos α)/ΔL];
• divergence angle (OY) γ=2×arctan [(δy/δL];
• wherein, δx=|X2−X3|, δy=|Y2−Y3|, α=|arctan (X1/Z1)|, and δL=Z1/cos α.

A measurement method for measuring the divergence angle of a lateral optical fiber lens by a measuring device for a lateral optical fiber lens, comprising an XZ movable platform and an XY movable platform;

• wherein a rotatable accommodating pipe is arranged on the XZ movable platform, an optical detection card is arranged on the XY movable platform, and an optical power probe is arranged below the optical detection card;
• and a height of the optical detection card is smaller than that of the accommodating pipe;
• wherein the measurement method comprises the steps of:
• initializing the measuring device, wherein the initial position of the center of the fiber lens is A0 (0, 0, Z0);
• adjusting the XZ movable platform and/or the accommodating pipe to drive the fiber lens to move and/or rotate until the projection of the fiber lens on the optical detection card does not exceed the square identification region, and when the center of the light spot projection on the optical detection card is located at the center O of the square identification region, the adjustment of the XZ movable platform and/or accommodating pipe is stopped, and at this time the position of the fiber lens is A1 (X1, 0, Z1);
• adjusting the XY movable platform to drive the optical detection card to move along the first direction of the X axis, and observing the change of the indicated reading P of the optical power probe, when P reaches the maximum value P1, the coordinates of O at this time (X2, 0, 0) are recorded;
• adjusting the XY movable platform to drive the optical detection card to move along the second direction of the X axis, and observing the change of the indicated reading P of the optical power probe, when P reaches 0.5 P1, the coordinates of O at this time (X3, 0, 0) are recorded;
• initializing the measuring device;
• adjusting the XY movable platform to drive the optical detection card to move along the first direction of the Y axis, and observing the change of the indicated reading P of the optical power probe, when P reaches the maximum value P1, the coordinates of O at this time (0, Y2, 0) are recorded;
• adjusting the XY movable platform to drive the optical detection card to move along the second direction of the Y axis, and observing the change of the indicated reading P of the optical power probe, when P reaches 0.5 P1, the coordinates of O at this time (0, Y3, 0) are recorded;
• adjusting the XZ movable platform and/or the accommodating pipe to drive the fiber lens to move and/or rotate until the projection of the fiber lens on the optical detection card does not exceed the square identification region, and when the center of the light spot projection on the optical detection card is located at the center O of the square identification region, the adjustment of the XZ movable platform and/or accommodating pipe is stopped, and at this time the position of the fiber lens is A4 (X4, 0, Z4);
• adjusting the XY movable platform to drive the optical detection card to move along the first direction of the X axis, and observing the change of the indicated reading P of the optical power probe, when P reaches the maximum value P1, the coordinates of O at this time (X5, 0, 0) are recorded;
• adjusting the XY movable platform to drive the optical detection card to move along the second direction of the X axis, and observing the change of the indicated reading P of the optical power probe, when P reaches 0.5 P1, the coordinates of O at this time (X6, 0, 0) are recorded;
• initializing the measuring device;
• adjusting the XY movable platform to drive the optical detection card to move along the first direction of the Y axis, and observing the change of the indicated reading P of the optical power probe, when P reaches the maximum value P1, the coordinates of O at this time (0, Y5, 0) are recorded;
• adjusting the XY movable platform to drive the optical detection card to move along the second direction of the Y axis, and observing the change of the indicated reading P of the optical power probe, when P reaches 0.5 P1, the coordinates of O at this time (0, Y6, 0) are recorded;
• and
• calculating the divergence angle of the fiber lens:
• divergence angle (OX) β≈2×arctan [(|δx−Δx|×cos α)/Δd];
• divergence angle (OY) γ=2×arctan [(|δy−Δy|/Δd];
• wherein δx=|X2−X3|, δy=|Y2−Y3|, Δx=|X5−X6|, Δy=|Y5−Y6|,
• Δz=|Z1−Z4|, Δd=Δz/cos α, α=|arctan (X4/Z4)|.