Multi-variable control methods for optical packages

A method of controlling an optical package comprising a semiconductor laser, a wavelength conversion device, adaptive optics configured to optically couple an output beam of the semiconductor laser into a waveguide portion of an input facet of a wavelength conversion device, an optical detector, and a package controller programmed to operate the semiconductor laser and at least one adjustable optical component of the adaptive optics, the method comprising:

• controlling the periodic lasing intensity of the semiconductor laser by controlling an amount of gain current IGAIN injected into a gain section of the semiconductor laser, wherein the gain current IGAIN has a periodic frequency vDATA;
• supplying a first position control signal to the adjustable optical component to control the position of the output beam on the input facet of the wavelength conversion device in a first direction;
• supplying a second position control signal to the adjustable optical component to control the position of the output beam on the input facet of the wavelength conversion device in a second direction;
• supplying a first modulated position feedback control signal to the adjustable optical component to modulate the position of the output beam on the input facet of the wavelength conversion device in the first direction, wherein:
• vθ1=(N+1/P)vDATA
• where vθ1 is the frequency of the first modulated wavelength feedback control signal, N is an integer and P is an integer greater than 1;
• supplying a second modulated position feedback control signal to the adjustable optical component to modulate the position of the output beam on the input facet of the wavelength conversion device in the second direction, wherein the second modulated position feedback control signal is out of phase with the first modulated position feedback control signal and a frequency vθ1 of the modulated position feedback control signal is the same as the frequency vθ2 of the modulated wavelength feedback control signal;
• measuring a response parameter of the wavelength conversion device;
• analyzing the measured response parameter of the wavelength conversion device to identify positional components attributable to the first modulated position feedback control signal and the second modulated position feedback control signal;
• adjusting the first position control signal based on the positional component attributable to the first modulated position feedback control signal to optimize the response parameter of the wavelength conversion device;
• and
• adjusting the second position control signal based on the positional component attributable to the second modulated position feedback control signal to optimize the response parameter of the wavelength conversion device.